diff --git a/cura/Machines/Models/GenericMaterialsModel.py b/cura/Machines/Models/GenericMaterialsModel.py
index 2fac919f3e..c185432f32 100644
--- a/cura/Machines/Models/GenericMaterialsModel.py
+++ b/cura/Machines/Models/GenericMaterialsModel.py
@@ -31,6 +31,7 @@ class GenericMaterialsModel(BaseMaterialsModel):
             self.setItems([])
             return
         extruder_stack = global_stack.extruders[extruder_position]
+        exclude_materials = set(global_stack.definition.getMetaDataEntry("exclude_materials", []))
 
         available_material_dict = self._material_manager.getAvailableMaterialsForMachineExtruder(global_stack,
                                                                                                  extruder_stack)
@@ -41,6 +42,9 @@ class GenericMaterialsModel(BaseMaterialsModel):
         item_list = []
         for root_material_id, container_node in available_material_dict.items():
             metadata = container_node.metadata
+            # Skip excluded materials
+            if metadata["id"] in exclude_materials:
+                continue
             # Only add results for generic materials
             if metadata["brand"].lower() != "generic":
                 continue
diff --git a/resources/definitions/ultimaker3.def.json b/resources/definitions/ultimaker3.def.json
index 05f74c6342..95218d1e08 100644
--- a/resources/definitions/ultimaker3.def.json
+++ b/resources/definitions/ultimaker3.def.json
@@ -25,7 +25,8 @@
         },
         "first_start_actions": [ "DiscoverUM3Action" ],
         "supported_actions": [ "DiscoverUM3Action" ],
-        "supports_usb_connection": false
+        "supports_usb_connection": false,
+        "exclude_materials": [ "generic_hips", "generic_petg" ]
     },