The German race, which until now has alternated a single annual grand prix date with Hockenheim, was thought endangered due to the withdrawal of the Green-influenced Rhineland-Palatinate government's state support.
But parliamentary leader Hendrik Hering told the Rhein-Zeitung newspaper: "A race in 2013 is possible.
"There could be a small state subsidy but it needs to be much less than before," he added.
Other German media reports said new talks have been held with F1 chief executive Bernie Ecclestone and those "initial discussions were positive".
"If it (the agreement) is very financially favourable, there could be a formula one event in 2013 at the Nurburgring," Hering added.