"No, definitely not," said the Briton when asked whether he could still win the championship. "I'm going to enjoy myself over the next few races. Points for the team would have been really important, but it's out of our hands."
Germany's Nico Hulkenberg was sixth for Force India with Frenchman Romain Grosjean, steering well clear of trouble after a spate of first lap smashes, seventh for Lotus.
Frenchman Jean-Eric Vergne was eighth for Toro Rosso, with Australian team mate Daniel Ricciardo ninth.
Hamilton, who had a ripped off strip of astroturf trailing from a sidepod in the closing laps, just kept off Sauber's Mexican Sergio Perez - the man who replaces him at McLaren next season - for 10th place after starting third.
Image: Red Bull driver Sebastian Vettel of Germany leaps off his car as he celebrates his win at the Korean Formula One Grand Prix at the Korean International Circuit in Yeongam, South Korea, Sunday, Oct. 14, 2012