diff --git a/libs/labelbox/src/labelbox/schema/project.py b/libs/labelbox/src/labelbox/schema/project.py
index 605da9cce..dc634c0a6 100644
--- a/libs/labelbox/src/labelbox/schema/project.py
+++ b/libs/labelbox/src/labelbox/schema/project.py
@@ -18,6 +18,7 @@
     LabelboxError,
     ProcessingWaitTimeout,
     ResourceConflict,
+    ResourceNotFoundError
 )
 from labelbox.orm import query
 from labelbox.orm.db_object import DbObject, Deletable, Updateable, experimental
@@ -33,6 +34,7 @@
 from labelbox.schema.identifiable import DataRowIdentifier, GlobalKey, UniqueId
 from labelbox.schema.identifiables import DataRowIdentifiers, UniqueIds
 from labelbox.schema.media_type import MediaType
+from labelbox.schema.model_config import ModelConfig
 from labelbox.schema.project_model_config import ProjectModelConfig
 from labelbox.schema.queue_mode import QueueMode
 from labelbox.schema.resource_tag import ResourceTag
@@ -1271,6 +1273,8 @@ def add_model_config(self, model_config_id: str) -> str:
             "modelConfigId": model_config_id,
         }
         result = self.client.execute(query, params)
+        if not result:
+            raise ResourceNotFoundError(ModelConfig, params)
         return result["createProjectModelConfig"]["projectModelConfigId"]
 
     def delete_project_model_config(self, project_model_config_id: str) -> bool:
@@ -1292,6 +1296,8 @@ def delete_project_model_config(self, project_model_config_id: str) -> bool:
             "id": project_model_config_id,
         }
         result = self.client.execute(query, params)
+        if not result:
+            raise ResourceNotFoundError(ProjectModelConfig, params)
         return result["deleteProjectModelConfig"]["success"]
 
     def set_labeling_parameter_overrides(
diff --git a/libs/labelbox/tests/integration/test_project_model_config.py b/libs/labelbox/tests/integration/test_project_model_config.py
index e4adf90a2..2979406de 100644
--- a/libs/labelbox/tests/integration/test_project_model_config.py
+++ b/libs/labelbox/tests/integration/test_project_model_config.py
@@ -1,4 +1,5 @@
 import pytest
+from labelbox.exceptions import ResourceNotFoundError
 
 def test_add_single_model_config(configured_project, model_config):
     project_model_config_id = configured_project.add_model_config(model_config.uid)
@@ -23,3 +24,7 @@ def test_add_multiple_model_config(client, rand_gen, configured_project, model_c
 def test_delete_project_model_config(configured_project, model_config):
     assert configured_project.delete_project_model_config(configured_project.add_model_config(model_config.uid))
     assert not len(configured_project.project_model_configs())
+
+def test_delete_nonexistant_project_model_config(configured_project):
+    with pytest.raises(ResourceNotFoundError):
+        configured_project.delete_project_model_config("nonexistant_project_model_config")