The president of European governing body UEFA Michel Platini attended along with the heads and representatives of the Asia Football Conderation (AFC), CONMEBOL (South America), CAF (Africa), OFC (Oceania) and CONCACAF (North, Central American and Caribbean).
The subject of the meeting, which comes on the eve of Blatter's election bid for a fifth term in office, was not revealed.
CONCACAF president Jeffrey Webb was not present after the FIFA vice-president was among those arrested on Wednesday morning by Swiss authorities on suspicion of alleged corruption going back 25 years.
Separately, Swiss investigators raided FIFA's headquarters as part of an investigation into the awarding of the 2018 and 2022 World Cups to Russia and Qatar.
UEFA have demanded that the FIFA election be postponed, while CAF are opposed to a postponement of the presidential election in which 79-year-old Blatter's only challenger will be Jordan's Prince Ali Bin Hussein, 39.