diff --git a/qiskit_ibm_runtime/estimator.py b/qiskit_ibm_runtime/estimator.py
index f149ddfa1..ab4665631 100644
--- a/qiskit_ibm_runtime/estimator.py
+++ b/qiskit_ibm_runtime/estimator.py
@@ -153,7 +153,6 @@ def _validate_options(self, options: dict) -> None:
         """Validate that primitive inputs (options) are valid
 
         Raises:
-            ValidationError: if validation fails.
             ValueError: if validation fails.
         """
 
@@ -168,6 +167,13 @@ def _validate_options(self, options: dict) -> None:
                 "a coupling map is required."
             )
 
+        if isinstance(rep_delay := options.get("execution", {}).get("rep_delay"), (int, float)):
+            rep_delay_range = self._backend.configuration().rep_delay_range
+            if rep_delay < rep_delay_range[0] or rep_delay > rep_delay_range[1]:
+                raise ValueError(
+                    f"rep_delay {rep_delay} is not in the backend rep_delay_range {rep_delay_range}"
+                )
+
     @classmethod
     def _program_id(cls) -> str:
         """Return the program ID."""
diff --git a/qiskit_ibm_runtime/sampler.py b/qiskit_ibm_runtime/sampler.py
index 7963f558c..7928126da 100644
--- a/qiskit_ibm_runtime/sampler.py
+++ b/qiskit_ibm_runtime/sampler.py
@@ -114,10 +114,14 @@ def _validate_options(self, options: dict) -> None:
         """Validate that primitive inputs (options) are valid
 
         Raises:
-            ValidationError: if validation fails.
+            ValueError: if validation fails.
         """
-
-        pass
+        if isinstance(rep_delay := options.get("execution", {}).get("rep_delay"), (int, float)):
+            rep_delay_range = self._backend.configuration().rep_delay_range
+            if rep_delay < rep_delay_range[0] or rep_delay > rep_delay_range[1]:
+                raise ValueError(
+                    f"rep_delay {rep_delay} is not in the backend rep_delay_range {rep_delay_range}"
+                )
 
     @classmethod
     def _program_id(cls) -> str:
diff --git a/release-notes/unreleased/2389.feat.rst b/release-notes/unreleased/2389.feat.rst
new file mode 100644
index 000000000..b81a4c77f
--- /dev/null
+++ b/release-notes/unreleased/2389.feat.rst
@@ -0,0 +1,2 @@
+Added client side validation to check if a given ``rep_delay`` is within the backend's
+``rep_delay_range``.
\ No newline at end of file
diff --git a/test/unit/test_sampler.py b/test/unit/test_sampler.py
index 50a7c83ca..eaeb0708f 100644
--- a/test/unit/test_sampler.py
+++ b/test/unit/test_sampler.py
@@ -105,7 +105,8 @@ def test_unsupported_dynamical_decoupling_with_dynamic_circuits(self):
 
     def test_run_default_options(self):
         """Test run using default options."""
-        session = MagicMock(spec=MockSession, _backend="common_backend")
+        backend = get_mocked_backend()
+        session = MagicMock(spec=MockSession, _backend=backend)
         options_vars = [
             (
                 SamplerOptions(  # pylint: disable=unexpected-keyword-arg
@@ -119,10 +120,10 @@ def test_run_default_options(self):
             ),
             (
                 {
-                    "execution": {"init_qubits": True, "rep_delay": 0.01},
+                    "execution": {"init_qubits": True, "rep_delay": 0.0001},
                 },
                 {
-                    "execution": {"init_qubits": True, "rep_delay": 0.01},
+                    "execution": {"init_qubits": True, "rep_delay": 0.0001},
                 },
             ),
         ]
@@ -136,6 +137,15 @@ def test_run_default_options(self):
                     f"{inputs} and {expected} not partially equal.",
                 )
 
+    def test_rep_delay_validation(self):
+        """Test rep_delay_validation."""
+        backend = get_mocked_backend()
+        session = MagicMock(spec=MockSession, _backend=backend)
+        options = {"execution": {"init_qubits": True, "rep_delay": 0.1}}
+        inst = SamplerV2(mode=session, options=options)
+        with self.assertRaises(ValueError):
+            inst.run((self.circuit,))
+
     def test_sampler_validations(self):
         """Test exceptions when failing client-side validations."""
         backend = get_mocked_backend()