With damp conditions developing in qualifying for the third time in four races, both Hulkenberg and Perez struggled with car balance at a slippery Shanghai International Circuit.
However, Hulkenberg felt he was in good shape for points in the race tomorrow.
"It was very wet out there and I was struggling a bit with the car balance under braking, but all in all I think we're in a good starting position for the race," said the German, who has contributed to the team's best ever start to a season by scoring 28 of the 44 points.
The session was tougher for Perez, who has struggled so far this weekened, two weeks after achieving Force India's first podium in five years and pushing the Silverstone squad to second in the team standings.
"It was not an easy session and the truth is that I've been struggling with the car balance all weekend. I think the wet weather today exaggerated those issues and it leaves me P16 and feeling a bit disappointed," said the Mexican.