diff --git a/canvas_modules/common-canvas/__tests__/common-properties/controls/multiselect-test.js b/canvas_modules/common-canvas/__tests__/common-properties/controls/multiselect-test.js
new file mode 100644
index 0000000000..e4c06ca0ec
--- /dev/null
+++ b/canvas_modules/common-canvas/__tests__/common-properties/controls/multiselect-test.js
@@ -0,0 +1,352 @@
+/*
+ * Copyright 2017-2021 Elyra Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import React from "react";
+import MultiSelectControl from "../../../src/common-properties/controls/multiselect";
+import propertyUtils from "../../_utils_/property-utils";
+import tableUtils from "./../../_utils_/table-utils";
+import { mount } from "enzyme";
+import { expect } from "chai";
+import Controller from "../../../src/common-properties/properties-controller";
+
+import multiselectParamDef from "../../test_resources/paramDefs/multiselect_paramDef.json";
+
+
+describe("multiselect renders correctly", () => {
+
+	const propertyName = "test-multiselect";
+	const propertyId = { name: propertyName };
+	const emptyValueIndicator = "None selected";
+
+	let controller;
+	const control = {
+		"name": "test-multiselect",
+		"label": {
+			"text": "multiselect"
+		},
+		"description": {
+			"text": "multiselect description"
+		},
+		"controlType": "multiselect",
+		"role": "enum",
+		"valueDef": {
+			"propType": "string",
+			"isList": false,
+			"isMap": false
+		},
+		"values": [
+			"Order",
+			"Keys",
+			"Condition",
+			"Gtt"
+		],
+		"valueLabels": [
+			"Order",
+			"Keys",
+			"Condition",
+			"Ranked condition"
+		]
+	};
+
+	beforeEach(() => {
+		controller = new Controller();
+		propertyUtils.setControls(controller, [control]);
+	});
+
+	afterEach(() => {
+		controller.setErrorMessages({});
+		controller.setControlStates({});
+	});
+	it("props should have been defined", () => {
+		const wrapper = mount(
+			<MultiSelectControl
+				store={controller.getStore()}
+				control={control}
+				controller={controller}
+				propertyId={propertyId}
+			/>
+		);
+		expect(wrapper.prop("control")).to.equal(control);
+		expect(wrapper.prop("controller")).to.equal(controller);
+		expect(wrapper.prop("propertyId")).to.equal(propertyId);
+	});
+
+	it("should render a multiselect with empty value label", () => {
+		const wrapper = mount(
+			<MultiSelectControl
+				store={controller.getStore()}
+				control={control}
+				controller={controller}
+				propertyId={propertyId}
+			/>
+		);
+
+		const multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		expect(multiselectWrapper.find("button > span").text()).to.equal(emptyValueIndicator);
+	});
+
+	it("multiselect handles null correctly", () => {
+		controller.setPropertyValues(
+			{ propertyName: null }
+		);
+		const wrapper = mount(
+			<MultiSelectControl
+				store={controller.getStore()}
+				control={control}
+				controller={controller}
+				propertyId={propertyId}
+			/>
+		);
+		let multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		expect(multiselectWrapper.find("button > span").text()).to.equal(emptyValueIndicator);
+		const multiselectButton = multiselectWrapper.find("button");
+		multiselectButton.simulate("click");
+
+		// select the first item
+		multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		const multiselectList = multiselectWrapper.find("div.bx--list-box__menu-item");
+		expect(multiselectList).to.be.length(4);
+		multiselectList.at(0).simulate("click");
+		const expectedValue = [multiselectList.at(0).text()];
+		expect(controller.getPropertyValue(propertyId)).to.eql(expectedValue);
+	});
+
+	it("multiselect handles undefined correctly", () => {
+		controller.setPropertyValues(
+			{ }
+		);
+		const wrapper = mount(
+			<MultiSelectControl
+				store={controller.getStore()}
+				control={control}
+				controller={controller}
+				propertyId={propertyId}
+			/>
+		);
+		let multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		expect(multiselectWrapper.find("button > span").text()).to.equal(emptyValueIndicator);
+		// open the multiselect
+		const multiselectButton = multiselectWrapper.find("button");
+		multiselectButton.simulate("click");
+		// select the first item
+		multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		const multiselectList = multiselectWrapper.find("div.bx--list-box__menu-item");
+		expect(multiselectList).to.be.length(4);
+		multiselectList.at(0).simulate("click");
+		const expectedValue = [multiselectList.at(0).text()];
+		expect(controller.getPropertyValue(propertyId)).to.eql(expectedValue);
+	});
+
+	it("multiselect renders when disabled", () => {
+		controller.updateControlState(propertyId, "disabled");
+		const wrapper = mount(
+			<MultiSelectControl
+				store={controller.getStore()}
+				control={control}
+				controller={controller}
+				propertyId={propertyId}
+			/>
+		);
+		const multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		expect(multiselectWrapper.find("MultiSelect").prop("disabled")).to.equal(true);
+	});
+
+	it("multiselect renders when hidden", () => {
+		controller.updateControlState(propertyId, "hidden");
+		const wrapper = mount(
+			<MultiSelectControl
+				store={controller.getStore()}
+				control={control}
+				controller={controller}
+				propertyId={propertyId}
+			/>
+		);
+		const multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		expect(multiselectWrapper.hasClass("hide")).to.equal(true);
+	});
+
+	it("Validate multiselect filtered correctly", () => {
+		controller.setControlStates({ "test-multiselect": { "enumFilter": ["order", "gtt"] } });
+		const wrapper = mount(
+			<MultiSelectControl
+				store={controller.getStore()}
+				control={control}
+				controller={controller}
+				propertyId={propertyId}
+			/>
+		);
+		let multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		// open the multiselect
+		const multiselectButton = multiselectWrapper.find("button");
+		multiselectButton.simulate("click");
+		multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		// select the first item
+		const multiselectList = multiselectWrapper.find("div.bx--list-box__menu-item");
+		expect(multiselectList).to.be.length(2);
+	});
+
+	it("multiselect renders messages correctly", () => {
+		controller.updateErrorMessage(propertyId, {
+			validation_id: propertyId.name,
+			type: "warning",
+			text: "bad multiselect value"
+		});
+		const wrapper = mount(
+			<MultiSelectControl
+				store={controller.getStore()}
+				control={control}
+				controller={controller}
+				propertyId={propertyId}
+			/>
+		);
+		const multiselectWrapper = wrapper.find("div[data-id='properties-test-multiselect']");
+		const messageWrapper = multiselectWrapper.find("div.properties-validation-message");
+		expect(messageWrapper).to.have.length(1);
+	});
+});
+
+describe("multiselect paramDef works correctly", () => {
+	let wrapper;
+	let renderedController;
+	beforeEach(() => {
+		const renderedObject = propertyUtils.flyoutEditorForm(multiselectParamDef);
+		wrapper = renderedObject.wrapper;
+		renderedController = renderedObject.controller;
+	});
+	afterEach(() => {
+		wrapper.unmount();
+	});
+
+	it("multiselect placeholder custom label rendered correctly", () => {
+		let multiselectWrapper = wrapper.find("div[data-id='properties-multiselect_custom_labels']");
+		const expectedEmptyLabel = multiselectParamDef.resources["multiselect_custom_labels.multiselect.dropdown.empty.label"];
+		expect(multiselectWrapper.find("button > span").text()).to.equal(expectedEmptyLabel);
+
+		const propertyId = { name: "multiselect_custom_labels" };
+		const multiselectButton = multiselectWrapper.find("button");
+		multiselectButton.simulate("click");
+
+		multiselectWrapper.update();
+		multiselectWrapper = wrapper.find("div[data-id='properties-multiselect_custom_labels']");
+		const multiselectList = multiselectWrapper.find("div.bx--list-box__menu-item");
+		expect(multiselectList).to.have.length(6);
+
+		multiselectList.at(0).simulate("click");
+		const expectedValue = [multiselectList.at(0).text()];
+		expect(renderedController.getPropertyValue(propertyId)).to.eql(expectedValue);
+
+		const expectedSelectedLabel = multiselectParamDef.resources["multiselect_custom_labels.multiselect.dropdown.options.selected.label"];
+		expect(multiselectWrapper.find("button > span").text()).to.equal(expectedSelectedLabel);
+	});
+
+	it("multiselect allows enum label different from enum value", () => {
+		let multiselectWrapper = wrapper.find("div[data-id='properties-multiselect_multiple_selected']");
+		const multiselectButton = multiselectWrapper.find("button");
+		multiselectButton.simulate("click");
+
+		multiselectWrapper.update();
+		multiselectWrapper = wrapper.find("div[data-id='properties-multiselect_multiple_selected']");
+		const multiselectList = multiselectWrapper.find("div.bx--list-box__menu-item");
+		expect(multiselectList).to.have.length(6);
+
+		// The options are not in the order they are defined. Test to verify "Custom" is in the text
+		expect(multiselectList.at(0).text()
+			.indexOf("Custom") > -1).to.equal(true);
+		expect(multiselectList.at(1).text()
+			.indexOf("Custom") > -1).to.equal(true);
+		expect(multiselectList.at(2).text()
+			.indexOf("Custom") > -1).to.equal(true);
+		expect(multiselectList.at(3).text()
+			.indexOf("Custom") > -1).to.equal(true);
+		expect(multiselectList.at(4).text()
+			.indexOf("Custom") > -1).to.equal(true);
+		expect(multiselectList.at(5).text()
+			.indexOf("Custom") > -1).to.equal(true);
+	});
+
+	it("multiselect renders correctly in a table - subpanel", () => {
+		const propertyId02 = { name: "multiselect_table", row: 0, col: 2 };
+		propertyUtils.openSummaryPanel(wrapper, "multiselect-table-panel");
+		let table = wrapper.find("div[data-id='properties-ci-multiselect_table']");
+
+		// Verify initial value
+		const rowOneColTwoInitValue = ["blue"];
+		expect(renderedController.getPropertyValue(propertyId02)).to.be.eql(rowOneColTwoInitValue);
+
+		// verify able to select a new option subPanel
+		const editButtons = table.find("button.properties-subpanel-button");
+		expect(editButtons).to.have.length(2);
+		editButtons.at(0).simulate("click");
+		const subPanel = wrapper.find(".properties-editstyle-sub-panel");
+		const subPanelMultiselect = subPanel.find("div[data-id='properties-multiselect_table_0_2']");
+
+		const subPanelMultiselectButton = subPanelMultiselect.find("input"); // filterable multiselect
+		subPanelMultiselectButton.simulate("click");
+
+		table.update();
+		table = wrapper.find("div[data-id='properties-ci-multiselect_table']");
+		const subPanelMultiselectList = table.find("div.bx--list-box__menu-item");
+		expect(subPanelMultiselectList).to.have.length(6);
+
+		subPanelMultiselectList.at(1).simulate("click");
+		const expectedSubPanelValue = rowOneColTwoInitValue.concat(subPanelMultiselectList.at(1).text());
+		expect(JSON.stringify(renderedController.getPropertyValue(propertyId02))).to.equal(JSON.stringify(expectedSubPanelValue));
+	});
+
+	it("multiselect renders correctly in a table - onpanel", () => {
+		const propertyId11 = { name: "multiselect_table", row: 1, col: 1 };
+		propertyUtils.openSummaryPanel(wrapper, "multiselect-table-panel");
+		let table = wrapper.find("div[data-id='properties-ci-multiselect_table']");
+
+		// Verify initial value
+		expect(renderedController.getPropertyValue(propertyId11)).to.be.eql([]);
+
+		tableUtils.selectCheckboxes(table, [1]); // Select second row for onPanel edit
+		table = wrapper.find("div[data-id='properties-ci-multiselect_table']");
+
+		// verify able to select a new option
+		const multiselectOnPanel = table.find(".properties-onpanel-container");
+		const multiselectButton = multiselectOnPanel.find("button");
+		multiselectButton.simulate("click");
+
+		table.update();
+		table = wrapper.find("div[data-id='properties-ci-multiselect_table']");
+		const multiselectList = table.find("div.bx--list-box__menu-item");
+		expect(multiselectList).to.have.length(4);
+
+		multiselectList.at(0).simulate("click");
+		const expectedValue = [multiselectList.at(0).text()];
+		expect(renderedController.getPropertyValue(propertyId11)).to.eql(expectedValue);
+	});
+});
+
+describe("multiselect classnames appear correctly", () => {
+	let wrapper;
+	beforeEach(() => {
+		const renderedObject = propertyUtils.flyoutEditorForm(multiselectParamDef);
+		wrapper = renderedObject.wrapper;
+	});
+
+	it("multiselect should have custom classname defined", () => {
+		expect(wrapper.find(".multiselect-control-class")).to.have.length(1);
+	});
+
+	it("multiselect should have custom classname defined in table cells", () => {
+		propertyUtils.openSummaryPanel(wrapper, "multiselect-table-panel");
+		expect(wrapper.find(".table-on-panel-multiselect-control-class")).to.have.length(2);
+		expect(wrapper.find(".table-subpanel-multiselect-control-class")).to.have.length(2);
+	});
+});
diff --git a/canvas_modules/common-canvas/__tests__/test_resources/paramDefs/multiselect_paramDef.json b/canvas_modules/common-canvas/__tests__/test_resources/paramDefs/multiselect_paramDef.json
new file mode 100644
index 0000000000..55987e669f
--- /dev/null
+++ b/canvas_modules/common-canvas/__tests__/test_resources/paramDefs/multiselect_paramDef.json
@@ -0,0 +1,544 @@
+{
+  "titleDefinition": {
+    "title": "MultiSelect"
+  },
+  "current_parameters": {
+    "multiselect_empty": [],
+    "multiselect": ["blue"],
+    "multiselect_multiple_selected": ["orange", "yellow"],
+    "multiselect_filterable": [],
+    "multiselect_filterable_single": ["green"],
+    "multiselect_filterable_multiple_selected": ["orange", "yellow"],
+    "multiselect_custom_labels": [],
+    "multiselect_error": [],
+    "multiselect_warning": [],
+    "hide": true,
+    "multiselect_hidden": [],
+    "disabled": true,
+    "multiselect_disabled": [],
+    "multiselect_table": [
+      [
+        ["cat"],
+        ["pear"],
+        ["blue"]
+      ],
+      [
+        [],
+        [],
+        ["red"]
+      ]
+    ]
+  },
+  "parameters": [
+    {
+      "id": "multiselect_empty",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ]
+    },
+    {
+      "id": "multiselect",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_multiple_selected",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_filterable",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_filterable_single",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_filterable_multiple_selected",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_custom_labels",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_error",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_warning",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ]
+    },
+    {
+      "id": "hide",
+      "type": "boolean"
+    },
+    {
+      "id": "multiselect_hidden",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "disabled",
+      "type": "boolean"
+    },
+    {
+      "id": "multiselect_disabled",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_table",
+      "type": "array[multiselect_table_struct]",
+      "default": []
+    }
+  ],
+  "complex_types": [
+    {
+      "id": "multiselect_table_struct",
+      "parameters": [
+        {
+          "id": "animal",
+          "enum": [
+            "dog",
+            "cat",
+            "pig",
+            "horse",
+            "all of the above animals"
+          ],
+          "default": ["horse"]
+        },
+        {
+          "id": "fruit",
+          "enum": [
+            "apple",
+            "orange",
+            "pear",
+            "strawberry"
+          ]
+        },
+        {
+          "id": "color",
+          "enum": [
+            "red",
+            "green",
+            "blue",
+            "purple",
+            "orange",
+            "brown"
+          ],
+          "default": ["red"]
+        }
+      ]
+    }
+],
+  "uihints": {
+    "id": "multiselect",
+    "icon": "images/default.svg",
+    "label": {
+      "default": "MultiSelect"
+    },
+    "parameter_info": [
+      {
+        "parameter_ref": "multiselect_empty",
+        "label": {
+          "default": "multiselect"
+        },
+        "description": {
+          "default": "multiselect no options selected"
+        },
+        "class_name": "multiselect-control-class",
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect",
+        "label": {
+          "default": "multiselect one option selected"
+        },
+        "description": {
+          "default": "multiselect with parameter value set to 'blue'"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_multiple_selected",
+        "label": {
+          "default": "multiselect multiple options selected"
+        },
+        "description": {
+          "default": "multiselect with multiple options selected with custom labels"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_filterable",
+        "label": {
+          "default": "multiselect filterable no options selected"
+        },
+        "description": {
+          "default": "multiselect dropdown with filter enabled"
+        },
+        "control": "multiselect",
+        "filterable": true
+      },
+      {
+        "parameter_ref": "multiselect_filterable_single",
+        "label": {
+          "default": "multiselect filterable one option selected"
+        },
+        "description": {
+          "default": "multiselect dropdown with filter enabled and one option selected"
+        },
+        "control": "multiselect",
+        "filterable": true
+      },
+      {
+        "parameter_ref": "multiselect_filterable_multiple_selected",
+        "label": {
+          "default": "multiselect filterable multiple options selected"
+        },
+        "description": {
+          "default": "multiselect dropdown with filter enabled and multiple options selected"
+        },
+        "control": "multiselect",
+        "filterable": true
+      },
+      {
+        "parameter_ref": "multiselect_custom_labels",
+        "label": {
+          "default": "multiselect custom labels"
+        },
+        "description": {
+          "default": "multiselect dropdown with custom labels set in resources"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_error",
+        "label": {
+          "default": "multiselect error"
+        },
+        "description": {
+          "default": "multiselect dropdown with error when set to 'red'",
+          "placement": "on_panel"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_warning",
+        "label": {
+          "default": "multiselect warning"
+        },
+        "description": {
+          "default": "Shouldn't be empty, cannot equal []",
+          "placement": "on_panel"
+        },
+        "control": "multiselect",
+        "filterable": true
+      },
+      {
+        "parameter_ref": "hide",
+        "label": {
+          "default": "hide 'multiselect hidden'"
+        }
+      },
+      {
+        "parameter_ref": "multiselect_hidden",
+        "label": {
+          "default": "multiselect hidden"
+        },
+        "description": {
+          "default": "multiselect dropdown hidden"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "disabled",
+        "label": {
+          "default": "disable 'multiselect disabled'"
+        }
+      },
+      {
+        "parameter_ref": "multiselect_disabled",
+        "label": {
+          "default": "multiselect disabled"
+        },
+        "description": {
+          "default": "multiselect dropdown disabled"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_table",
+        "label": {
+          "default": "multiselect table"
+        },
+        "description": {
+          "default": "A multiselect should not be displayed in the table 'inline'. This control is best used 'on_panel' or in a 'subpanel'. As shown below, if 'inline', the select options will be clipped within the row.",
+          "placement": "on_panel"
+        }
+      }
+    ],
+    "complex_type_info": [
+      {
+        "complex_type_ref": "multiselect_table_struct",
+        "parameters": [
+          {
+            "parameter_ref": "animal",
+            "label": {
+              "default": "Pet inline"
+            },
+            "description": {
+              "default": "Pet"
+            },
+            "width": 10,
+            "edit_style": "inline",
+            "control": "multiselect",
+            "class_name": "table-multiselect-control-class"
+          },
+          {
+            "parameter_ref": "fruit",
+            "label": {
+              "default": "Fruit on-panel"
+            },
+            "description": {
+              "default": "Fruit"
+            },
+            "width": 10,
+            "edit_style": "on_panel",
+            "control": "multiselect",
+            "class_name": "table-on-panel-multiselect-control-class"
+          },
+          {
+            "parameter_ref": "color",
+            "label": {
+              "default": "color"
+            },
+            "description": {
+              "default": "color subpanel"
+            },
+            "width": 10,
+            "edit_style": "subpanel",
+            "control": "multiselect",
+            "filterable": true,
+            "class_name": "table-subpanel-multiselect-control-class"
+          }
+        ]
+      }
+    ],
+    "group_info": [
+      {
+        "id": "multiselect-values",
+        "label": {
+          "default": "Values"
+        },
+        "type": "controls",
+        "parameter_refs": [
+          "multiselect_empty",
+          "multiselect",
+          "multiselect_multiple_selected",
+          "multiselect_filterable",
+          "multiselect_filterable_single",
+          "multiselect_filterable_multiple_selected",
+          "multiselect_custom_labels"
+        ]
+      },
+      {
+        "id": "multiselect-conditions",
+        "label": {
+          "default": "Conditions"
+        },
+        "type": "controls",
+        "parameter_refs": [
+          "multiselect_error",
+          "multiselect_warning",
+          "hide",
+          "multiselect_hidden",
+          "disabled",
+          "multiselect_disabled"
+        ]
+      },
+      {
+        "id": "multiselect-tables",
+        "label": {
+          "default": "Table"
+        },
+        "type": "panels",
+        "group_info": [
+          {
+            "id": "multiselect-table-panel",
+            "type": "summaryPanel",
+            "label": {
+              "default": "multiselect in a table"
+            },
+            "group_info": [
+              {
+                "id": "multiselect-table-controls",
+                "parameter_refs": [
+                  "multiselect_table"
+                ]
+              }
+            ]
+          }
+        ]
+      }
+    ]
+  },
+  "conditions": [
+    {
+      "validation": {
+        "fail_message": {
+          "type": "error",
+          "focus_parameter_ref": "multiselect_error",
+          "message": {
+            "default": "Don't select 'red'"
+          }
+        },
+        "evaluate": {
+          "condition": {
+            "parameter_ref": "multiselect_error",
+            "op": "notContains",
+            "value": "red"
+          }
+        }
+      }
+    },
+    {
+      "validation": {
+        "fail_message": {
+          "type": "warning",
+          "focus_parameter_ref": "multiselect_warning",
+          "message": {
+            "default": "Shouldn't be empty, cannot equal []"
+          }
+        },
+        "evaluate": {
+          "condition": {
+            "parameter_ref": "multiselect_warning",
+            "op": "notEquals",
+            "value": []
+          }
+        }
+      }
+    },
+    {
+      "visible": {
+        "parameter_refs": [
+          "multiselect_hidden"
+        ],
+        "evaluate": {
+          "condition": {
+            "parameter_ref": "hide",
+            "op": "equals",
+            "value": false
+          }
+        }
+      }
+    },
+    {
+      "enabled": {
+        "parameter_refs": [
+          "multiselect_disabled"
+        ],
+        "evaluate": {
+          "condition": {
+            "parameter_ref": "disabled",
+            "op": "equals",
+            "value": false
+          }
+        }
+      }
+    }
+  ],
+  "resources": {
+    "multiselect_multiple_selected.red.label": "Custom red",
+    "multiselect_multiple_selected.orange.label": "Custom orange",
+    "multiselect_multiple_selected.yellow.label": "Custom yellow",
+    "multiselect_multiple_selected.green.label": "Custom green",
+    "multiselect_multiple_selected.blue.label": "Custom blue",
+    "multiselect_multiple_selected.purple.label": "Custom purple",
+    "multiselect_custom_labels.multiselect.dropdown.empty.label": "nothing selected yet",
+    "multiselect_custom_labels.multiselect.dropdown.options.selected.label": "options are selected"
+  }
+}
diff --git a/canvas_modules/common-canvas/locales/common-properties/locales/en.json b/canvas_modules/common-canvas/locales/common-properties/locales/en.json
index fb3ab8dd09..3a4d065eaf 100644
--- a/canvas_modules/common-canvas/locales/common-properties/locales/en.json
+++ b/canvas_modules/common-canvas/locales/common-properties/locales/en.json
@@ -70,8 +70,12 @@
   "list.table.label": "Values",
   "dropdown.tooltip.openMenu": "Open menu",
   "dropdown.tooltip.closeMenu": "Close menu",
+  "dropdown.tooltip.clear.all": "Clear all",
+  "dropdown.tooltip.clear.selection": "Clear selection",
   "truncate.long.string.error": "These values exceed the display limit of {truncate_limit} characters and can't be edited.",
   "properties.label": "Properties",
   "readonlytable.edit.button.label": "Edit",
-  "toggletext.icon.description": "{toggletext_label} Icon"
+  "toggletext.icon.description": "{toggletext_label} Icon",
+  "multiselect.dropdown.empty.label": "None selected",
+  "multiselect.dropdown.options.selected.label": "options selected"
 }
diff --git a/canvas_modules/common-canvas/locales/common-properties/locales/eo.json b/canvas_modules/common-canvas/locales/common-properties/locales/eo.json
index 8ad8d34f38..12050d5aa3 100644
--- a/canvas_modules/common-canvas/locales/common-properties/locales/eo.json
+++ b/canvas_modules/common-canvas/locales/common-properties/locales/eo.json
@@ -71,8 +71,12 @@
   "list.table.label": "[Esperanto~Values~~~~eo]",
   "dropdown.tooltip.openMenu": "[Esperanto~Open menu~~~~eo]",
   "dropdown.tooltip.closeMenu": "[Esperanto~Close menu~~~~~~eo]",
+  "dropdown.tooltip.clear.all": "[Esperanto~Clear all~~~~~~eo]",
+  "dropdown.tooltip.clear.selection": "[Esperanto~Clear selection~~~~~~eo]",
   "truncate.long.string.error": "[Esperanto~These values exceed the display limit of {truncate_limit} characters and can't be edited.~~~~~~~~~~~~eo]",
   "properties.label": "[Esperanto~Properties~~~~~~eo]",
   "readonlytable.edit.button.label": "[Esperanto~Edit~eo]",
-  "toggletext.icon.description": "[Esperanto~{toggletext_label} Icon~~~~eo]"
+  "toggletext.icon.description": "[Esperanto~{toggletext_label} Icon~~~~eo]",
+  "multiselect.dropdown.empty.label": "[Esperanto~None selected~~~~~~eo]",
+  "multiselect.dropdown.options.selected.label": "[Esperanto~options selected~~~~~~eo]"
 }
diff --git a/canvas_modules/common-canvas/src/common-properties/constants/constants.js b/canvas_modules/common-canvas/src/common-properties/constants/constants.js
index 98768f2b68..6df483ae9a 100644
--- a/canvas_modules/common-canvas/src/common-properties/constants/constants.js
+++ b/canvas_modules/common-canvas/src/common-properties/constants/constants.js
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2020 Elyra Authors
+ * Copyright 2017-2021 Elyra Authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -92,10 +92,14 @@ _defineConstant("MESSAGE_KEYS", {
 	LIST_TABLE_LABEL: "list.table.label",
 	DROPDOWN_TOOLTIP_OPENMENU: "dropdown.tooltip.openMenu",
 	DROPDOWN_TOOLTIP_CLOSEMENU: "dropdown.tooltip.closeMenu",
+	DROPDOWN_TOOLTIP_CLEARALL: "dropdown.tooltip.clear.all",
+	DROPDOWN_TOOLTIP_CLEARSELECTION: "dropdown.tooltip.clear.selection",
 	TRUNCATE_LONG_STRING_ERROR: "truncate.long.string.error",
 	PROPERTIES_LABEL: "properties.label",
 	READONLYTABLE_EDIT_BUTTON_LABEL: "readonlytable.edit.button.label",
-	TOGGLETEXT_ICON_DESCRIPTION: "toggletext.icon.description"
+	TOGGLETEXT_ICON_DESCRIPTION: "toggletext.icon.description",
+	MULTISELECT_DROPDOWN_EMPTY_LABEL: "multiselect.dropdown.empty.label",
+	MULTISELECT_DROPDOWN_OPTIONS_SELECTED_LABEL: "multiselect.dropdown.options.selected.label"
 });
 
 _defineConstant("CHARACTER_LIMITS", {
diff --git a/canvas_modules/common-canvas/src/common-properties/constants/form-constants.js b/canvas_modules/common-canvas/src/common-properties/constants/form-constants.js
index 9bb82b854d..7c716cdd82 100644
--- a/canvas_modules/common-canvas/src/common-properties/constants/form-constants.js
+++ b/canvas_modules/common-canvas/src/common-properties/constants/form-constants.js
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2020 Elyra Authors
+ * Copyright 2017-2021 Elyra Authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -81,6 +81,7 @@ const ControlType = {
 	RADIOSET: "radioset",
 	CHECKBOXSET: "checkboxset",
 	ONEOFSELECT: "oneofselect",
+	MULTISELECT: "multiselect",
 	SOMEOFSELECT: "someofselect",
 	SELECTCOLUMN: "selectcolumn",
 	SELECTCOLUMNS: "selectcolumns",
diff --git a/canvas_modules/common-canvas/src/common-properties/controls/control-factory.js b/canvas_modules/common-canvas/src/common-properties/controls/control-factory.js
index 22a28b3307..92d72ede35 100644
--- a/canvas_modules/common-canvas/src/common-properties/controls/control-factory.js
+++ b/canvas_modules/common-canvas/src/common-properties/controls/control-factory.js
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2020 Elyra Authors
+ * Copyright 2017-2021 Elyra Authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,6 +38,7 @@ import CheckboxControl from "./checkbox";
 import CheckboxsetControl from "./checkboxset";
 import RadiosetControl from "./radioset";
 import Dropdown from "./dropdown";
+import MultiSelectControl from "./multiselect";
 import SomeofselectControl from "./someofselect";
 import SelectColumnsControl from "./selectcolumns";
 import StructureEditorControl from "./structureeditor";
@@ -211,6 +212,9 @@ export default class ControlFactory {
 				rightFlyout={this.rightFlyout}
 			/>);
 			break;
+		case (ControlType.MULTISELECT):
+			createdControl = (<MultiSelectControl {...props} />);
+			break;
 		case (ControlType.SELECTCOLUMN):
 			if (!tableInfo || (tableInfo && tableInfo.allowColumnControls)) {
 				createdControl = (<Dropdown
diff --git a/canvas_modules/common-canvas/src/common-properties/controls/multiselect/index.js b/canvas_modules/common-canvas/src/common-properties/controls/multiselect/index.js
new file mode 100644
index 0000000000..7b920738ed
--- /dev/null
+++ b/canvas_modules/common-canvas/src/common-properties/controls/multiselect/index.js
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2017-2021 Elyra Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import Multiselect from "./multiselect.jsx";
+export default Multiselect;
diff --git a/canvas_modules/common-canvas/src/common-properties/controls/multiselect/multiselect.jsx b/canvas_modules/common-canvas/src/common-properties/controls/multiselect/multiselect.jsx
new file mode 100644
index 0000000000..33e276bd0b
--- /dev/null
+++ b/canvas_modules/common-canvas/src/common-properties/controls/multiselect/multiselect.jsx
@@ -0,0 +1,149 @@
+/*
+ * Copyright 2017-2021 Elyra Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import React from "react";
+import PropTypes from "prop-types";
+import { connect } from "react-redux";
+import { MultiSelect } from "carbon-components-react";
+import * as ControlUtils from "./../../util/control-utils";
+import ValidationMessage from "./../../components/validation-message";
+import classNames from "classnames";
+import * as PropertyUtils from "./../../util/property-utils.js";
+import { MESSAGE_KEYS, STATES } from "./../../constants/constants.js";
+import { formatMessage } from "./../../util/property-utils";
+
+class MultiSelectControl extends React.Component {
+	constructor(props) {
+		super(props);
+		this.getSelectedOption = this.getSelectedOption.bind(this);
+		this.genSelectOptions = this.genSelectOptions.bind(this);
+		this.handleOnChange = this.handleOnChange.bind(this);
+	}
+
+	getSelectedOption(options, selectedValues) {
+		const values = PropertyUtils.stringifyFieldValue(selectedValues, this.props.control);
+		const selectedOptions = [];
+		if (values) {
+			values.forEach((value) => selectedOptions.push(options.find(function(option) {
+				return option.value === value;
+			})));
+		}
+		return selectedOptions;
+	}
+
+	genSelectOptions(selectedValues) {
+		const options = [];
+		for (let j = 0; j < this.props.controlOpts.values.length; j++) {
+			options.push({
+				value: this.props.controlOpts.values[j],
+				label: this.props.controlOpts.valueLabels[j]
+			});
+		}
+		const selectedOptions = this.getSelectedOption(options, selectedValues);
+		return {
+			options: options,
+			selectedOptions: selectedOptions
+		};
+	}
+
+	handleOnChange(evt) {
+		const controlValues = [];
+		for (let i = 0; i < evt.selectedItems.length; i++) {
+			controlValues.push(evt.selectedItems[i].value);
+		}
+		this.props.controller.updatePropertyValue(this.props.propertyId, controlValues);
+	}
+
+	render() {
+		const multiSelectDropdown = this.genSelectOptions(this.props.value);
+
+		const listBoxMenuIconTranslationIds = {
+			"close.menu": formatMessage(this.reactIntl, MESSAGE_KEYS.DROPDOWN_TOOLTIP_CLOSEMENU),
+			"open.menu": formatMessage(this.reactIntl, MESSAGE_KEYS.DROPDOWN_TOOLTIP_OPENMENU),
+			"clear.all": formatMessage(this.reactIntl, MESSAGE_KEYS.DROPDOWN_TOOLTIP_CLEARALL),
+			"clear.selection": formatMessage(this.reactIntl, MESSAGE_KEYS.DROPDOWN_TOOLTIP_CLEARSELECTION)
+		};
+
+		const overrideEmptyLabelKey = `${this.props.control.name}.multiselect.dropdown.empty.label`;
+		const defaultEmptyLabel = formatMessage(this.reactIntl, MESSAGE_KEYS.MULTISELECT_DROPDOWN_EMPTY_LABEL);
+		const overrideOptionsSelectedLabelKey = `${this.props.control.name}.multiselect.dropdown.options.selected.label`;
+		const defaultOptionsSelectedLabel = formatMessage(this.reactIntl, MESSAGE_KEYS.MULTISELECT_DROPDOWN_OPTIONS_SELECTED_LABEL);
+
+		let label = "";
+		if (multiSelectDropdown.selectedOptions.length === 0) { // Display message for no options selected
+			label = this.props.controller.getResource(overrideEmptyLabelKey, defaultEmptyLabel);
+		} else { // Display message for multiple options selected
+			label = this.props.controller.getResource(overrideOptionsSelectedLabelKey, defaultOptionsSelectedLabel);
+		}
+
+		let dropdownComponent = null;
+		if (this.props.control.filterable) {
+			dropdownComponent = (<MultiSelect.Filterable
+				id={`${ControlUtils.getDataId(this.props.propertyId)}-multiselect-filterable`}
+				disabled={this.props.state === STATES.DISABLED}
+				translateWithId={(id) => listBoxMenuIconTranslationIds[id]}
+				items={multiSelectDropdown.options}
+				initialSelectedItems={multiSelectDropdown.selectedOptions}
+				onChange={this.handleOnChange}
+				placeholder={label}
+				light
+			/>);
+		} else {
+			dropdownComponent = (<MultiSelect
+				id={`${ControlUtils.getDataId(this.props.propertyId)}-multiselect`}
+				disabled={this.props.state === STATES.DISABLED}
+				translateWithId={(id) => listBoxMenuIconTranslationIds[id]}
+				items={multiSelectDropdown.options}
+				initialSelectedItems={multiSelectDropdown.selectedOptions}
+				onChange={this.handleOnChange}
+				label={label}
+				light
+			/>);
+		}
+
+		return (
+			<div data-id={ControlUtils.getDataId(this.props.propertyId)}
+				className={classNames("properties-dropdown", { "hide": this.props.state === STATES.HIDDEN }, this.props.messageInfo ? this.props.messageInfo.type : null)}
+			>
+				{dropdownComponent}
+				<ValidationMessage state={this.props.state} messageInfo={this.props.messageInfo} inTable={this.props.tableControl} />
+			</div>
+		);
+	}
+}
+
+MultiSelectControl.propTypes = {
+	control: PropTypes.object.isRequired,
+	propertyId: PropTypes.object.isRequired,
+	controller: PropTypes.object.isRequired,
+	tableControl: PropTypes.bool,
+	controlOpts: PropTypes.object, // pass in by redux
+	state: PropTypes.string, // pass in by redux
+	value: PropTypes.array, // pass in by redux
+	messageInfo: PropTypes.object // pass in by redux
+};
+
+const mapStateToProps = (state, ownProps) => {
+	const props = {
+		value: ownProps.controller.getPropertyValue(ownProps.propertyId),
+		state: ownProps.controller.getControlState(ownProps.propertyId),
+		messageInfo: ownProps.controller.getErrorMessage(ownProps.propertyId),
+		controlOpts: ownProps.controller.getFilteredEnumItems(ownProps.propertyId, ownProps.control)
+	};
+	return props;
+};
+
+export default connect(mapStateToProps, null)(MultiSelectControl);
diff --git a/canvas_modules/common-canvas/src/common-properties/form/EditorForm.js b/canvas_modules/common-canvas/src/common-properties/form/EditorForm.js
index 169c0050ff..af6626b7ab 100644
--- a/canvas_modules/common-canvas/src/common-properties/form/EditorForm.js
+++ b/canvas_modules/common-canvas/src/common-properties/form/EditorForm.js
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2020 Elyra Authors
+ * Copyright 2017-2021 Elyra Authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,8 +18,7 @@
 
 import { Control } from "./ControlInfo";
 import { UIItem } from "./UIItem";
-import { GroupType, PanelType, Type, ControlType, ParamRole } from "../constants/form-constants";
-import { ORIENTATIONS } from "../constants/form-constants.js";
+import { GroupType, PanelType, Type, ControlType, ParamRole, ORIENTATIONS } from "../constants/form-constants";
 import logger from "../../../utils/logger";
 import { StructureDef } from "./StructureInfo";
 import { Action } from "./ActionInfo";
diff --git a/canvas_modules/harness/src/client/components/common-properties-components.jsx b/canvas_modules/harness/src/client/components/common-properties-components.jsx
index 62d538d1bf..085aad1baf 100644
--- a/canvas_modules/harness/src/client/components/common-properties-components.jsx
+++ b/canvas_modules/harness/src/client/components/common-properties-components.jsx
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2020 Elyra Authors
+ * Copyright 2017-2021 Elyra Authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -57,6 +57,8 @@ import {
 	ONEOFSELECT_PROPS_INFO,
 	ONEOFSELECT_CUSTOM_VALUE_PROPS_INFO,
 	FORCED_RADIOSET_PROPS_INFO,
+	MULTISELECT_PROPS_INFO,
+	MULTISELECT_FILTERABLE_PROPS_INFO,
 	SOMEOFSELECT_PROPS_INFO,
 	FORCED_CHECKBOX_SET_PROPS_INFO,
 	SELECTSCHEMA_PROPS_INFO,
@@ -251,7 +253,7 @@ class CommonPropertiesComponents extends React.Component {
 				"id", "type", "role", "enum", "required", "default",
 				"uihints",
 				"parameter_info",
-				"parameter_ref", "control", "label", "moveable_rows", "rows",
+				"parameter_ref", "control", "label", "moveable_rows", "rows", "filterable",
 				"description",
 				"language",
 				"orientation"
@@ -366,6 +368,7 @@ class CommonPropertiesComponents extends React.Component {
 					"--checkboxset",
 					"--radioset",
 					"--oneofselect",
+					"--multiselect",
 					"--someofselect",
 					"--selectschema",
 					"--selectcolumn",
@@ -1194,6 +1197,49 @@ class CommonPropertiesComponents extends React.Component {
 						</div>
 					</div>
 				</div>
+
+				<div className="harness-properties-documentation-panels-controls-component">
+					<h3 id="--multiselect" className="harness-section-subtitle">multiselect</h3>
+					<p>A multi-selection dropdown control is rendered when the <span className="harness-highlight">control</span> is
+						set to <span className="harness-highlight">multiselect</span> in the <span className="harness-highlight">uihints</span> section
+						of the <span className="harness-highlight">parameter_info</span>.
+					</p>
+					<div className="harness-section-row">
+						<div className="harness-section-column">
+							<CommonProperties
+								propertiesInfo={MULTISELECT_PROPS_INFO}
+								propertiesConfig={this.propertiesConfig}
+							/>
+							{this.renderRightFlyoutButton(MULTISELECT_PROPS_INFO)}
+						</div>
+						<div className="harness-section-column harness-section-column-code">
+							<pre className="harness-json-block">
+								{this.jsonReplacer(MULTISELECT_PROPS_INFO.parameterDef, "control")}
+							</pre>
+						</div>
+					</div>
+					<p>If <span className="harness-highlight">filterable</span> is set to true, this dropdown selection can be filtered.
+					</p>
+					<div className="harness-section-row">
+						<div className="harness-section-column">
+							<CommonProperties
+								propertiesInfo={MULTISELECT_FILTERABLE_PROPS_INFO}
+								propertiesConfig={this.propertiesConfig}
+							/>
+							{this.renderRightFlyoutButton(MULTISELECT_FILTERABLE_PROPS_INFO)}
+						</div>
+						<div className="harness-section-column harness-section-column-code">
+							<pre className="harness-json-block">
+								{this.jsonReplacer(MULTISELECT_FILTERABLE_PROPS_INFO.parameterDef, "custom",
+									["uihints",
+										"id", "parameter_info",
+										"parameter_info", "label", "description", "default", "control", "filterable"
+									])}
+							</pre>
+						</div>
+					</div>
+				</div>
+
 				<div className="harness-properties-documentation-panels-controls-component">
 					<h3 id="--someofselect" className="harness-section-subtitle">someofselect</h3>
 					<p>A multi-selection control is rendered for a parameter with an <span className="harness-highlight">enum</span> list
diff --git a/canvas_modules/harness/src/client/components/common-properties-conditions.jsx b/canvas_modules/harness/src/client/components/common-properties-conditions.jsx
index 2278f2e94a..de07f2e53d 100644
--- a/canvas_modules/harness/src/client/components/common-properties-conditions.jsx
+++ b/canvas_modules/harness/src/client/components/common-properties-conditions.jsx
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2020 Elyra Authors
+ * Copyright 2017-2021 Elyra Authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -39,6 +39,7 @@ import {
 	RADIOSET_HORIZONTAL_ERROR_PROPS_INFO,
 	RADIOSET_VERTICAL_WARNING_PROPS_INFO,
 	ONEOFSELECT_ERROR_PROPS_INFO,
+	MULTISELECT_ERROR_PROPS_INFO,
 	SOMEOFSELECT_ERROR_PROPS_INFO,
 	SELECTCOLUMN_ERROR_PROPS_INFO,
 	SELECTCOLUMNS_ERROR_PROPS_INFO,
@@ -328,6 +329,8 @@ class CommonPropertiesComponents extends React.Component {
 				dmMeasurementEquals: "no", dmMeasurementNotEquals: "no", dmRoleEquals: "no", dmRoleNotEquals: "no", lengthEquals: "no", lengthGreaterThan: "no", lengthLessThan: "no" },
 			{ Control: "oneofselect (string)", empty: "yes", greaterLessThan: "no", equals: "yes", contains: "yes", matches: "yes", colNotExists: "no", isDateTime: "no", dmTypeEquals: "no", dmTypeNotEquals: "no",
 				dmMeasurementEquals: "no", dmMeasurementNotEquals: "no", dmRoleEquals: "no", dmRoleNotEquals: "no", lengthEquals: "yes", lengthGreaterThan: "yes", lengthLessThan: "yes" },
+			{ Control: "multiselect ([string])", empty: "yes", greaterLessThan: "no", equals: "yes", contains: "yes", matches: "no", colNotExists: "no", isDateTime: "no", dmTypeEquals: "no", dmTypeNotEquals: "no",
+				dmMeasurementEquals: "no", dmMeasurementNotEquals: "no", dmRoleEquals: "no", dmRoleNotEquals: "no", lengthEquals: "yes", lengthGreaterThan: "yes", lengthLessThan: "yes" },
 			{ Control: "timeField (time)", empty: "yes", greaterLessThan: "no", equals: "yes", contains: "yes", matches: "no", colNotExists: "no", isDateTime: "yes", dmTypeEquals: "no", dmTypeNotEquals: "no",
 				dmMeasurementEquals: "no", dmMeasurementNotEquals: "no", dmRoleEquals: "no", dmRoleNotEquals: "no", lengthEquals: "no", lengthGreaterThan: "no", lengthLessThan: "no" },
 			{ Control: "dateField (date)", empty: "yes", greaterLessThan: "no", equals: "yes", contains: "yes", matches: "no", colNotExists: "no", isDateTime: "yes", dmTypeEquals: "no", dmTypeNotEquals: "no",
@@ -779,6 +782,27 @@ class CommonPropertiesComponents extends React.Component {
 						</div>
 					</div>
 				</div>
+
+				<div className="harness-conditions-documentation-panels-controls-component">
+					<h3 id="--multiselect" className="harness-section-subtitle">multiselect</h3>
+					<p>The multiselect control is of type <span className="harness-highlight">[string]</span>.
+						The below example shows an error if the option 'red' is selected.
+					</p>
+					<div className="harness-section-row">
+						<div className="harness-section-column">
+							<CommonProperties
+								propertiesInfo={MULTISELECT_ERROR_PROPS_INFO}
+								propertiesConfig={this.propertiesConfig}
+							/>
+						</div>
+						<div className="harness-section-column harness-section-column-code">
+							<pre className="harness-json-block">
+								{this.jsonReplacer(MULTISELECT_ERROR_PROPS_INFO.parameterDef, "conditions")}
+							</pre>
+						</div>
+					</div>
+				</div>
+
 				<div className="harness-conditions-documentation-panels-controls-component">
 					<h3 id="--someofselect" className="harness-section-subtitle">someofselect</h3>
 					<p>A someofselect control is of type <span className="harness-highlight">[string]</span>.
@@ -1061,8 +1085,9 @@ class CommonPropertiesComponents extends React.Component {
 					<h3 id="--filteredEnum" className="harness-section-subtitle">Filtered Enumeration Conditions</h3>
 					<p>The <span className="harness-highlight">enum_filter</span> condition operates upon controls
 						whose parameter is backed by an enumerated list of options. This includes radioset, checkboxset,
-						and droplist controls. When the condition is true, enum_filter conditions allow authors
-						to dynamically filter the available enumeration options based upon the state of other parameters.
+						and droplist controls, but excluding <span className="harness-highlight">multiselect</span>. When
+						the condition is true, enum_filter conditions allow authors to dynamically filter the available
+						enumeration options based upon the state of other parameters.
 					</p>
 					<div className="harness-section-row">
 						<div className="harness-section-column">
diff --git a/canvas_modules/harness/src/client/constants/conditions-documentation-constants.js b/canvas_modules/harness/src/client/constants/conditions-documentation-constants.js
index 327656b813..3a2217f137 100644
--- a/canvas_modules/harness/src/client/constants/conditions-documentation-constants.js
+++ b/canvas_modules/harness/src/client/constants/conditions-documentation-constants.js
@@ -1434,6 +1434,75 @@ _defineConstant("ONEOFSELECT_ERROR_PROPS_INFO", {
 		}
 	}
 });
+_defineConstant("MULTISELECT_ERROR_PROPS_INFO", {
+	"title": "Multiselect Title",
+	"parameterDef": {
+		"current_parameters": {
+			"multiselectList": []
+		},
+		"parameters": [
+			{
+				"id": "multiselectList",
+				"enum": [
+					"red",
+					"orange",
+					"yellow",
+					"green",
+					"blue",
+					"purple"
+				]
+			}
+		],
+		"uihints": {
+			"id": "multiselectList",
+			"parameter_info": [
+				{
+					"parameter_ref": "multiselectList",
+					"label": {
+						"default": "Multiselect Control Name"
+					},
+					"description": {
+						"default": "Select multiple options from the 'multiselect' dropdown, besides 'red'"
+					},
+					"control": "multiselect"
+				}
+			],
+			"group_info": [
+				{
+					"id": "Multiselect Control",
+					"type": "controls",
+					"parameter_refs": [
+						"multiselectList"
+					]
+				}
+			]
+		},
+		"conditions": [
+			{
+				"validation": {
+					"fail_message": {
+						"type": "error",
+						"message": {
+							"default": "an option must be selected.",
+							"resource_key": "multiselectList_invalid"
+						},
+						"focus_parameter_ref": "multiselectList"
+					},
+					"evaluate": {
+						"condition": {
+							"parameter_ref": "multiselectList",
+							"op": "notContains",
+							"value": "red"
+						}
+					}
+				}
+			}
+		],
+		"resources": {
+			"multiselectList_invalid": "The option red should not be selected."
+		}
+	}
+});
 _defineConstant("SOMEOFSELECT_ERROR_PROPS_INFO", {
 	"title": "Some of Select Title",
 	"parameterDef": {
diff --git a/canvas_modules/harness/src/client/constants/properties-documentation-constants.js b/canvas_modules/harness/src/client/constants/properties-documentation-constants.js
index da979b1ffe..130e1bc6d2 100644
--- a/canvas_modules/harness/src/client/constants/properties-documentation-constants.js
+++ b/canvas_modules/harness/src/client/constants/properties-documentation-constants.js
@@ -2441,6 +2441,107 @@ _defineConstant("FORCED_RADIOSET_PROPS_INFO", {
 		]
 	}
 });
+_defineConstant("MULTISELECT_PROPS_INFO", {
+	"title": "Multiselect Title",
+	"parameterDef": {
+		"titleDefinition": {
+			"title": "Control: multiselect",
+			"editable": false
+		},
+		"current_parameters": {
+			"multiselectList": ["blue"]
+		},
+		"parameters": [
+			{
+				"id": "multiselectList",
+				"enum": [
+					"red",
+					"orange",
+					"yellow",
+					"green",
+					"blue",
+					"purple"
+				],
+				"default": ["yellow"]
+			}
+		],
+		"uihints": {
+			"id": "multiselectList",
+			"parameter_info": [
+				{
+					"parameter_ref": "multiselectList",
+					"label": {
+						"default": "Multiselect Control Name"
+					},
+					"description": {
+						"default": "multiselect test"
+					},
+					"control": "multiselect"
+				}
+			],
+			"group_info": [
+				{
+					"id": "Multiselect Control",
+					"type": "controls",
+					"parameter_refs": [
+						"multiselectList"
+					]
+				}
+			]
+		}
+	}
+});
+_defineConstant("MULTISELECT_FILTERABLE_PROPS_INFO", {
+	"title": "Multiselect Title",
+	"parameterDef": {
+		"titleDefinition": {
+			"title": "Control: multiselect",
+			"editable": false
+		},
+		"current_parameters": {
+			"multiselectList": []
+		},
+		"parameters": [
+			{
+				"id": "multiselectList",
+				"enum": [
+					"red",
+					"orange",
+					"yellow",
+					"green",
+					"blue",
+					"purple"
+				],
+				"default": ["yellow"]
+			}
+		],
+		"uihints": {
+			"id": "multiselectList",
+			"parameter_info": [
+				{
+					"parameter_ref": "multiselectList",
+					"label": {
+						"default": "Multiselect Control Name"
+					},
+					"description": {
+						"default": "multiselect test"
+					},
+					"control": "multiselect",
+					"filterable": true
+				}
+			],
+			"group_info": [
+				{
+					"id": "Multiselect Control",
+					"type": "controls",
+					"parameter_refs": [
+						"multiselectList"
+					]
+				}
+			]
+		}
+	}
+});
 _defineConstant("SOMEOFSELECT_PROPS_INFO", {
 	"title": "Some of Select Title",
 	"parameterDef": {
diff --git a/canvas_modules/harness/test_resources/parameterDefs/multiselect_paramDef.json b/canvas_modules/harness/test_resources/parameterDefs/multiselect_paramDef.json
new file mode 100644
index 0000000000..55987e669f
--- /dev/null
+++ b/canvas_modules/harness/test_resources/parameterDefs/multiselect_paramDef.json
@@ -0,0 +1,544 @@
+{
+  "titleDefinition": {
+    "title": "MultiSelect"
+  },
+  "current_parameters": {
+    "multiselect_empty": [],
+    "multiselect": ["blue"],
+    "multiselect_multiple_selected": ["orange", "yellow"],
+    "multiselect_filterable": [],
+    "multiselect_filterable_single": ["green"],
+    "multiselect_filterable_multiple_selected": ["orange", "yellow"],
+    "multiselect_custom_labels": [],
+    "multiselect_error": [],
+    "multiselect_warning": [],
+    "hide": true,
+    "multiselect_hidden": [],
+    "disabled": true,
+    "multiselect_disabled": [],
+    "multiselect_table": [
+      [
+        ["cat"],
+        ["pear"],
+        ["blue"]
+      ],
+      [
+        [],
+        [],
+        ["red"]
+      ]
+    ]
+  },
+  "parameters": [
+    {
+      "id": "multiselect_empty",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ]
+    },
+    {
+      "id": "multiselect",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_multiple_selected",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_filterable",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_filterable_single",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_filterable_multiple_selected",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_custom_labels",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_error",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_warning",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ]
+    },
+    {
+      "id": "hide",
+      "type": "boolean"
+    },
+    {
+      "id": "multiselect_hidden",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "disabled",
+      "type": "boolean"
+    },
+    {
+      "id": "multiselect_disabled",
+      "enum": [
+        "red",
+        "orange",
+        "yellow",
+        "green",
+        "blue",
+        "purple"
+      ],
+      "required": true
+    },
+    {
+      "id": "multiselect_table",
+      "type": "array[multiselect_table_struct]",
+      "default": []
+    }
+  ],
+  "complex_types": [
+    {
+      "id": "multiselect_table_struct",
+      "parameters": [
+        {
+          "id": "animal",
+          "enum": [
+            "dog",
+            "cat",
+            "pig",
+            "horse",
+            "all of the above animals"
+          ],
+          "default": ["horse"]
+        },
+        {
+          "id": "fruit",
+          "enum": [
+            "apple",
+            "orange",
+            "pear",
+            "strawberry"
+          ]
+        },
+        {
+          "id": "color",
+          "enum": [
+            "red",
+            "green",
+            "blue",
+            "purple",
+            "orange",
+            "brown"
+          ],
+          "default": ["red"]
+        }
+      ]
+    }
+],
+  "uihints": {
+    "id": "multiselect",
+    "icon": "images/default.svg",
+    "label": {
+      "default": "MultiSelect"
+    },
+    "parameter_info": [
+      {
+        "parameter_ref": "multiselect_empty",
+        "label": {
+          "default": "multiselect"
+        },
+        "description": {
+          "default": "multiselect no options selected"
+        },
+        "class_name": "multiselect-control-class",
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect",
+        "label": {
+          "default": "multiselect one option selected"
+        },
+        "description": {
+          "default": "multiselect with parameter value set to 'blue'"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_multiple_selected",
+        "label": {
+          "default": "multiselect multiple options selected"
+        },
+        "description": {
+          "default": "multiselect with multiple options selected with custom labels"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_filterable",
+        "label": {
+          "default": "multiselect filterable no options selected"
+        },
+        "description": {
+          "default": "multiselect dropdown with filter enabled"
+        },
+        "control": "multiselect",
+        "filterable": true
+      },
+      {
+        "parameter_ref": "multiselect_filterable_single",
+        "label": {
+          "default": "multiselect filterable one option selected"
+        },
+        "description": {
+          "default": "multiselect dropdown with filter enabled and one option selected"
+        },
+        "control": "multiselect",
+        "filterable": true
+      },
+      {
+        "parameter_ref": "multiselect_filterable_multiple_selected",
+        "label": {
+          "default": "multiselect filterable multiple options selected"
+        },
+        "description": {
+          "default": "multiselect dropdown with filter enabled and multiple options selected"
+        },
+        "control": "multiselect",
+        "filterable": true
+      },
+      {
+        "parameter_ref": "multiselect_custom_labels",
+        "label": {
+          "default": "multiselect custom labels"
+        },
+        "description": {
+          "default": "multiselect dropdown with custom labels set in resources"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_error",
+        "label": {
+          "default": "multiselect error"
+        },
+        "description": {
+          "default": "multiselect dropdown with error when set to 'red'",
+          "placement": "on_panel"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_warning",
+        "label": {
+          "default": "multiselect warning"
+        },
+        "description": {
+          "default": "Shouldn't be empty, cannot equal []",
+          "placement": "on_panel"
+        },
+        "control": "multiselect",
+        "filterable": true
+      },
+      {
+        "parameter_ref": "hide",
+        "label": {
+          "default": "hide 'multiselect hidden'"
+        }
+      },
+      {
+        "parameter_ref": "multiselect_hidden",
+        "label": {
+          "default": "multiselect hidden"
+        },
+        "description": {
+          "default": "multiselect dropdown hidden"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "disabled",
+        "label": {
+          "default": "disable 'multiselect disabled'"
+        }
+      },
+      {
+        "parameter_ref": "multiselect_disabled",
+        "label": {
+          "default": "multiselect disabled"
+        },
+        "description": {
+          "default": "multiselect dropdown disabled"
+        },
+        "control": "multiselect"
+      },
+      {
+        "parameter_ref": "multiselect_table",
+        "label": {
+          "default": "multiselect table"
+        },
+        "description": {
+          "default": "A multiselect should not be displayed in the table 'inline'. This control is best used 'on_panel' or in a 'subpanel'. As shown below, if 'inline', the select options will be clipped within the row.",
+          "placement": "on_panel"
+        }
+      }
+    ],
+    "complex_type_info": [
+      {
+        "complex_type_ref": "multiselect_table_struct",
+        "parameters": [
+          {
+            "parameter_ref": "animal",
+            "label": {
+              "default": "Pet inline"
+            },
+            "description": {
+              "default": "Pet"
+            },
+            "width": 10,
+            "edit_style": "inline",
+            "control": "multiselect",
+            "class_name": "table-multiselect-control-class"
+          },
+          {
+            "parameter_ref": "fruit",
+            "label": {
+              "default": "Fruit on-panel"
+            },
+            "description": {
+              "default": "Fruit"
+            },
+            "width": 10,
+            "edit_style": "on_panel",
+            "control": "multiselect",
+            "class_name": "table-on-panel-multiselect-control-class"
+          },
+          {
+            "parameter_ref": "color",
+            "label": {
+              "default": "color"
+            },
+            "description": {
+              "default": "color subpanel"
+            },
+            "width": 10,
+            "edit_style": "subpanel",
+            "control": "multiselect",
+            "filterable": true,
+            "class_name": "table-subpanel-multiselect-control-class"
+          }
+        ]
+      }
+    ],
+    "group_info": [
+      {
+        "id": "multiselect-values",
+        "label": {
+          "default": "Values"
+        },
+        "type": "controls",
+        "parameter_refs": [
+          "multiselect_empty",
+          "multiselect",
+          "multiselect_multiple_selected",
+          "multiselect_filterable",
+          "multiselect_filterable_single",
+          "multiselect_filterable_multiple_selected",
+          "multiselect_custom_labels"
+        ]
+      },
+      {
+        "id": "multiselect-conditions",
+        "label": {
+          "default": "Conditions"
+        },
+        "type": "controls",
+        "parameter_refs": [
+          "multiselect_error",
+          "multiselect_warning",
+          "hide",
+          "multiselect_hidden",
+          "disabled",
+          "multiselect_disabled"
+        ]
+      },
+      {
+        "id": "multiselect-tables",
+        "label": {
+          "default": "Table"
+        },
+        "type": "panels",
+        "group_info": [
+          {
+            "id": "multiselect-table-panel",
+            "type": "summaryPanel",
+            "label": {
+              "default": "multiselect in a table"
+            },
+            "group_info": [
+              {
+                "id": "multiselect-table-controls",
+                "parameter_refs": [
+                  "multiselect_table"
+                ]
+              }
+            ]
+          }
+        ]
+      }
+    ]
+  },
+  "conditions": [
+    {
+      "validation": {
+        "fail_message": {
+          "type": "error",
+          "focus_parameter_ref": "multiselect_error",
+          "message": {
+            "default": "Don't select 'red'"
+          }
+        },
+        "evaluate": {
+          "condition": {
+            "parameter_ref": "multiselect_error",
+            "op": "notContains",
+            "value": "red"
+          }
+        }
+      }
+    },
+    {
+      "validation": {
+        "fail_message": {
+          "type": "warning",
+          "focus_parameter_ref": "multiselect_warning",
+          "message": {
+            "default": "Shouldn't be empty, cannot equal []"
+          }
+        },
+        "evaluate": {
+          "condition": {
+            "parameter_ref": "multiselect_warning",
+            "op": "notEquals",
+            "value": []
+          }
+        }
+      }
+    },
+    {
+      "visible": {
+        "parameter_refs": [
+          "multiselect_hidden"
+        ],
+        "evaluate": {
+          "condition": {
+            "parameter_ref": "hide",
+            "op": "equals",
+            "value": false
+          }
+        }
+      }
+    },
+    {
+      "enabled": {
+        "parameter_refs": [
+          "multiselect_disabled"
+        ],
+        "evaluate": {
+          "condition": {
+            "parameter_ref": "disabled",
+            "op": "equals",
+            "value": false
+          }
+        }
+      }
+    }
+  ],
+  "resources": {
+    "multiselect_multiple_selected.red.label": "Custom red",
+    "multiselect_multiple_selected.orange.label": "Custom orange",
+    "multiselect_multiple_selected.yellow.label": "Custom yellow",
+    "multiselect_multiple_selected.green.label": "Custom green",
+    "multiselect_multiple_selected.blue.label": "Custom blue",
+    "multiselect_multiple_selected.purple.label": "Custom purple",
+    "multiselect_custom_labels.multiselect.dropdown.empty.label": "nothing selected yet",
+    "multiselect_custom_labels.multiselect.dropdown.options.selected.label": "options are selected"
+  }
+}