Turkish motorsport officials say the return of the country's grand prix to the Formula 1 calendar is now up to the government, after agreeing terms with Bernie Ecclestone.
Istanbul Park, which hosted an F1 grand prix from 2005-11, was tipped for a return to the calendar on Wednesday.
This was after the FIA World Motor Sport Council announced it had moved the German GP forward to reserve the July 21 date for another, yet-to-be-named European-based event.
On Thursday, Turkish motorsport federation TOSFED said circuit operator Vural Ak had met with Ecclestone to discuss a new deal.
It said, however, that the conclusion of the agreement depended on the government funding the event.
"We are making every effort so that Formula 1 races can be held at our Istanbul Park track... [in 2013] and in future years," TOSFED chairman Demire Berberoglu said in a statement.
"Everybody knows that what is needed for its presence in the Formula 1 race calendar for 2013 and following years is a guarantee and approval of the required budget at the government level.
"This will develop according to the prime minister's decision."