There was a German Army group stationed in Norway throughout the war. (Choice duty if you ask me)
For some reason I have always seen a lot of the Pz. IIIN model there. There is a small chance these were destroyed by resistance, but most likely scuttled by their crews or more likely, they just walked away from them when they had the chance to surrender. Being left in the weather in Norway for 60+ years can take its toll on steel.
Robb