The Brazilian, who has not featured for the Championship club this season, was expected to leave Loftus Road over the summer.
The 34-year-old is now eager to resolve his future as he looks to secure a place in the Brazil squad for next year's World Cup in his home country.
"I need to sort out my situation in January. A lot of things will happen," he told Globo Esporte.
"The situation is different now and the QPR chairman is seeing that I am not getting selected by the manager."
Cesar joined QPR on a four-year deal from Inter Milan in summer 2012.