“I am looking for different opportunities,” Kubica told reporters at a Singapore Grand Prix news conference.
“In order to evaluate other opportunities I have taken the decision that I will not continue more with Williams after this year,” he added, as cited by the Reuters news agency.
Kubica has scored just one point in 14 Grand Prix races so far this season, and Williams are in last place in the championship.
Kubica, the first Pole to compete in Formula 1, had a serious crash in a rally car in 2011. He injured his arm, shoulder and leg. He then started a long road to recovery and made an against-the-odds F1 comeback earlier this year.
He debuted in F1 in 2006 and claimed a total of 12 podium finishes until 2010. He won the Canadian Grand Prix with BMW Sauber in 2008 and then competed for Renault, taking three podium spots in his season with the French manufacturer.
(pk/gs)
Source: PAP/IAR, Reuters