diff --git a/src/bedrock_agentcore/memory/client.py b/src/bedrock_agentcore/memory/client.py
index 8c8649ac..55932a16 100644
--- a/src/bedrock_agentcore/memory/client.py
+++ b/src/bedrock_agentcore/memory/client.py
@@ -1920,6 +1920,20 @@ def _validate_strategy_config(self, strategy: Dict[str, Any], strategy_type: str
         for namespace in namespaces:
             self._validate_namespace(namespace)
 
+    def _try_get_override_type(self, override_type: Optional[str]) -> Optional[OverrideType]:
+        """Safely convert override_type string to OverrideType enum.
+
+        Returns None if override_type is None or not a valid OverrideType value
+        (e.g., 'SELF_MANAGED' which is a valid configuration type but not in the enum).
+        """
+        if override_type is None:
+            return None
+        try:
+            return OverrideType(override_type)
+        except ValueError:
+            # Unknown override type (e.g., SELF_MANAGED), return None
+            return None
+
     def _wrap_configuration(
         self, config: Dict[str, Any], strategy_type: str, override_type: Optional[str] = None
     ) -> Dict[str, Any]:
@@ -1932,8 +1946,8 @@ def _wrap_configuration(
             builtin_config_keys = ["triggerEveryNMessages", "historicalContextWindowSize"]
 
             if strategy_type == "CUSTOM" and override_type:
-                override_enum = OverrideType(override_type)
-                if override_enum in CUSTOM_EXTRACTION_WRAPPER_KEYS:
+                override_enum = self._try_get_override_type(override_type)
+                if override_enum and override_enum in CUSTOM_EXTRACTION_WRAPPER_KEYS:
                     wrapped_config["extraction"] = {
                         "customExtractionConfiguration": {CUSTOM_EXTRACTION_WRAPPER_KEYS[override_enum]: extraction}
                     }
@@ -1961,13 +1975,16 @@ def _wrap_configuration(
                             }
                         }
                 elif strategy_type == "CUSTOM" and override_type:
-                    override_enum = OverrideType(override_type)
-                    if override_enum in CUSTOM_CONSOLIDATION_WRAPPER_KEYS:
+                    override_enum = self._try_get_override_type(override_type)
+                    if override_enum and override_enum in CUSTOM_CONSOLIDATION_WRAPPER_KEYS:
                         wrapped_config["consolidation"] = {
                             "customConsolidationConfiguration": {
                                 CUSTOM_CONSOLIDATION_WRAPPER_KEYS[override_enum]: consolidation
                             }
                         }
+                    else:
+                        # Unknown override type (e.g., SELF_MANAGED), pass through as-is
+                        wrapped_config["consolidation"] = consolidation
             else:
                 wrapped_config["consolidation"] = consolidation
 
@@ -1975,11 +1992,14 @@ def _wrap_configuration(
             reflection = config["reflection"]
 
             if strategy_type == "CUSTOM" and override_type:
-                override_enum = OverrideType(override_type)
-                if override_enum in CUSTOM_REFLECTION_WRAPPER_KEYS:
+                override_enum = self._try_get_override_type(override_type)
+                if override_enum and override_enum in CUSTOM_REFLECTION_WRAPPER_KEYS:
                     wrapped_config["reflection"] = {
                         "customReflectionConfiguration": {CUSTOM_REFLECTION_WRAPPER_KEYS[override_enum]: reflection}
                     }
+                else:
+                    # Unknown override type (e.g., SELF_MANAGED), pass through as-is
+                    wrapped_config["reflection"] = reflection
             else:
                 wrapped_config["reflection"] = reflection
 
diff --git a/tests/bedrock_agentcore/memory/test_client.py b/tests/bedrock_agentcore/memory/test_client.py
index f6d0dc5f..84d46c80 100644
--- a/tests/bedrock_agentcore/memory/test_client.py
+++ b/tests/bedrock_agentcore/memory/test_client.py
@@ -3283,6 +3283,74 @@ def test_wrap_configuration_custom_episodic_override():
         )
 
 
+def test_wrap_configuration_custom_self_managed():
+    """Test _wrap_configuration with CUSTOM strategy and SELF_MANAGED type.
+
+    SELF_MANAGED is a valid configuration type but not in the OverrideType enum.
+    The method should handle this gracefully by passing configuration through as-is.
+    See: https://github.com/aws/bedrock-agentcore-sdk-python/issues/212
+    """
+    with patch("boto3.client"):
+        client = MemoryClient()
+
+        config = {
+            "extraction": {
+                "historicalContextWindowSize": 10,
+                "triggerEveryNMessages": 5,
+            },
+            "consolidation": {
+                "appendToPrompt": "Consolidate data",
+                "modelId": "consolidation-model",
+            },
+            "reflection": {
+                "appendToPrompt": "Reflect on data",
+                "modelId": "reflection-model",
+            },
+        }
+
+        # Should NOT raise ValueError for SELF_MANAGED
+        wrapped = client._wrap_configuration(config, "CUSTOM", "SELF_MANAGED")
+
+        # Configuration should be passed through as-is (no special wrapping)
+        assert "extraction" in wrapped
+        assert wrapped["extraction"]["historicalContextWindowSize"] == 10
+        assert wrapped["extraction"]["triggerEveryNMessages"] == 5
+
+        # Consolidation should also be passed through (no wrapping for unknown override types)
+        assert "consolidation" in wrapped
+        assert wrapped["consolidation"]["appendToPrompt"] == "Consolidate data"
+        assert wrapped["consolidation"]["modelId"] == "consolidation-model"
+
+        # Reflection should also be passed through
+        assert "reflection" in wrapped
+        assert wrapped["reflection"]["appendToPrompt"] == "Reflect on data"
+        assert wrapped["reflection"]["modelId"] == "reflection-model"
+
+
+def test_try_get_override_type_valid():
+    """Test _try_get_override_type returns enum for valid override types."""
+    with patch("boto3.client"):
+        from bedrock_agentcore.memory.constants import OverrideType
+
+        client = MemoryClient()
+
+        assert client._try_get_override_type("SEMANTIC_OVERRIDE") == OverrideType.SEMANTIC_OVERRIDE
+        assert client._try_get_override_type("EPISODIC_OVERRIDE") == OverrideType.EPISODIC_OVERRIDE
+        assert client._try_get_override_type("SUMMARY_OVERRIDE") == OverrideType.SUMMARY_OVERRIDE
+        assert client._try_get_override_type("USER_PREFERENCE_OVERRIDE") == OverrideType.USER_PREFERENCE_OVERRIDE
+
+
+def test_try_get_override_type_invalid():
+    """Test _try_get_override_type returns None for invalid override types."""
+    with patch("boto3.client"):
+        client = MemoryClient()
+
+        assert client._try_get_override_type(None) is None
+        assert client._try_get_override_type("SELF_MANAGED") is None
+        assert client._try_get_override_type("UNKNOWN_TYPE") is None
+        assert client._try_get_override_type("") is None
+
+
 def test_get_last_k_turns_auto_pagination():
     """Test get_last_k_turns automatically paginates until k turns are found."""
     with patch("boto3.client"):