Speaking at the Asian Football Confederation (AFC) congress in Bahrain, neither rejected the option although they insisted it had not been discussed.
Van Praag, Figo and Jordan's Prince Ali bin al Hussein are considered to be some way behind the support enjoyed by Blatter, who will be seeking a landslide win on May 29.
Van Praag and Figo sat next to each other at the five-hour congress but the Dutch FA boss said he didn't discuss any vote strategy with the former Real Madrid galactico.
Figo gave a vague response when asked about the prospect of one or more candidates withdrawing, giving the impression that it could be under consideration.
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"If I tell you the truth, I don't know what's going to happen. You know in this world, everything can happen and I don't even know what's going to happen tomorrow," he said.
Blatter, 79, is frequently criticised outside of football's national associations but he enjoys strong support among FIFA members, making him hot favourite for a fifth term.
"It is easy to say to the congress, 'we all back you Mr. Blatter', but at the same time not giving the opportunity to candidates to talk, that is in my opinion not very fair," van Praag told AFP.
"So I'm disappointed. But on the other hand I have to say it is their good right to do so."
Figo said: "Of course this is the individual congress of a confederation but I don't see any kind of problem to speak, to address.
Blatter has been assured of strong support in both Africa and Asia, the two biggest confederations, which would put him much of the way towards victory and a fifth term.