I know youre wishing you 4 bet preflop. Im torn, because the point of you flatting that three bet preflop is to draw in 10-10, JJ AK/Aq type of hands for a flop just like this. But Im feeling that youll be seeing aces or kings a lot more than Ad/K or some weird mid PP.

Its tough, but even if he has you beat you most likely have 11 outs, as i dont think he would be so scared of the diamonds if he had a big one...id say call, but Im not feeling too good about it