diff --git a/litellm/router_strategy/complexity_router/complexity_router.py b/litellm/router_strategy/complexity_router/complexity_router.py
index d7bbf85d4fa..2c1097b7af3 100644
--- a/litellm/router_strategy/complexity_router/complexity_router.py
+++ b/litellm/router_strategy/complexity_router/complexity_router.py
@@ -880,7 +880,9 @@ class _ClassifierCircuitBreaker:
 
 
 def _is_classifier_timeout(exc: BaseException) -> bool:
-    if isinstance(exc, TimeoutError):
+    # asyncio.TimeoutError became an alias of the built-in TimeoutError in Python 3.11.
+    # LiteLLM still supports 3.10, where they are distinct exception classes.
+    if isinstance(exc, (TimeoutError, asyncio.TimeoutError)):
         return True
     from litellm.exceptions import Timeout as LiteLLMTimeout
 
diff --git a/tests/test_litellm/router_strategy/test_complexity_router.py b/tests/test_litellm/router_strategy/test_complexity_router.py
index 137fb128a57..130a6f5a488 100644
--- a/tests/test_litellm/router_strategy/test_complexity_router.py
+++ b/tests/test_litellm/router_strategy/test_complexity_router.py
@@ -26,6 +26,7 @@ from litellm.router_strategy.complexity_router.complexity_router import (
     KeywordOverride,
     _built_in_prompt,
     _ClassifierCircuitBreaker,
+    _is_classifier_timeout,
     _matched_plan_mode_sentinel,
     classification_system_prompt,
 )
@@ -2196,6 +2197,9 @@ class TestLLMClassifier:
         breaker.record_failure(permit, is_timeout=False)
         assert breaker.acquire_permit() is not None
 
+    def test_asyncio_timeout_is_a_classifier_timeout_on_python_310(self):
+        assert _is_classifier_timeout(asyncio.TimeoutError()) is True
+
     @pytest.mark.asyncio
     async def test_aclassify_classifier_cost_is_none_when_call_is_unpriced(
         self, llm_complexity_router, mock_router_instance