Sorry, saw you said you are in the SB and 1/3 of your stack is in the middle already. That would lead me to think your stack is 4500 before posting the SB and you have 3k behind. With a good read on the villains in this hand I may still push hoping to pickup the limped blinds from players who have most to lose by calling but I wouldn't fault a fold here either. With so few players remaining and equal payouts to 25 spots I like to pick my spots wisely. You also need to steal to keep ahead of the blind levels. I couldn't fault either decision depending on how the villains and the rest of the table has been playing.