First, what was the reasoning behind your 3bet size? If it was to induce action to allow you to get your stack in to showdown, with the possibility that it might be multiway, then here"s your opportunity - if this is what you were hoping for, then it"s an easy call.
Personally, I would 3bet much more preflop - in fact, with 7.5k plus antes in the middle after the raise and call, I may well shove 40k..... if they fold, we pick up a reasonable stack increase..... but more importantly our shove can look like a weaker hand making a big squeeze, and we will get called often enough to make it a profitable move against two players.
I hate the spot you"re in now - if the UTG raiser had shoved, and the guy in the middle folded, you have a much easier decision. Against two players, you"re hardly ever ahead now, and it"s a sigh fold. For that reason, I"m doing everything I can to get this hand headsup before the flop - the 3bet needs to be much bigger than your min-raise, perhaps somewhere around the 12k-15k mark, if not a shove.
As played, fold now.