Kamui Kobayashi apologised to fans and says he is evaluating his future opportunities after Caterham entered administration last week.
The Leafield-based team has endured a troublesome campaign and administrators took control last Friday following a series of exchanges between Tony Fernandes and Engavest SA.
Kobayashi will consequently be absent from at least the next two races, along with team-mate Marcus Ericsson.
"Unfortunately, due to team’s situation, I will not able to race in United States GP and Brazilian GP," he posted on his official Facebook page.
"I am very sorry for the fans looking forward those races. While I am carefully observing the situation, I will evaluate possibilities and make best choice for my future."
"Turbulent times," commented Swede Ericsson.
"A lot of things going on a the moment. But I'm pushing on as usual and keeping my spirit high."