En 3bet pots ante la donk del rival de medio pot?

32/4/4.7/16 54manos
SB ($2.65)
BB ($5)
UTG ($3.17)
UTG+1 ($3.95)
UTG+2 ($3.06)
Hero ($1.88)
CO ($5.32)
BTN ($2.04)
Dealt to Hero 9♦ 9♥
UTG raises to $0.10, fold, fold, Hero raises to $0.30, fold, fold, fold, fold, UTG calls $0.20
FLOP ($0.67) 3♦ J♠ 3♠
UTG bets $0.35, Hero ¿¿¿¿????