The FIA president revealed that the three candidates are Epsilon Euskadi, Litespeed/Lotus and – should BMW-Sauber find a buyer – the Hinwil based team's new guise.
"Last night we got the final offers and in the next day or two, together with the due diligence people, we'll assess them and then we'll pick one of them," Mosley said.
One team not in the running is Lola, despite the British racing car constructor this week showing off a scale wind-tunnel model of its intended 2010 car.
"We have deferred our F1 entry to 2011," Lola chief Robin Brundle is quoted as saying by racecar-engineering.com.
"We have not given up on our plan, just deferred it by a year," he added.