Sutil's best result came in Monaco, where he finished fifth, while he retired in three races.
Ever since Pireli changed the tyres after drivers raised safety concerns following blow outs at Silverstone, Force India have been struggling to adapt.
After the British Grand Prix, the team could add just two points to its tally from four races.
Sutil, who has been with the team since his Spyker days, said dropping Indian Grand Prix from the 2014 season was unfortunate.
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"It is disappointing, it looked (set) for a longer future but that's how it is. I just hope it's there in 2015 again. I am just a driver and we need to get on with it.
Kimi Raikonnen has secured a drive with Ferrari for the next season and it is expected that a few more changes could be seen in the 2014 drivers' line-up. Sutil said if he gets a better opportunity, he will surely grab it.
"At the moment it is nice to race with Force India. I enjoy my work but I am open for my future," Sutil said.