Significantly backed by Banco do Brasil, the 21-year-old says his management has already opened negotiations for a F1 race seat in 2015.
"Conversations have begun already," he told Brazil's Sportv. "My management is looking around.
"Force India is difficult, but I think Sauber is possible."
Nasr said he is not interested in joining a back-of-the-grid team like Marussia or Caterham.
"I think I would not accept it," he revealed. "It's almost like racing in GP2. In fact I think it would be better to continue in GP2 because you're not burning yourself in F1.
"I'm not saying I want a great team, but a midfield one that gives me a position to fight for the points would be fantastic. I think it's possible," Nasr added.
He said stepping up at his current F1 employer, Williams, is unlikely.
"It's hard to get a place at Williams because the two drivers (Massa and Valtteri Bottas) have done a good job and the team will not want to change that.
"I will keep up with all of the teams and see what happens.
"Williams has given me a very good background on what to expect in F1. I participate in all of the meetings and I'm always on the team radio," said Nasr.