I think he cant 3bet 10% in this concrete situation, because he is OOP vs fish and you. I think his range is something like this: TT+,AJs+,KQs,AQo+
I think he cant 3bet anything else
On this flop I would play straightforward, because there are 1mil of SD combos for fish, so his turn c/r makes no sense for me
I think calling here is best by far