Saad Hariri had requested the delay to the consultations, which had been scheduled for Monday, in a phone call with President Michel Aoun to allow "more consultation on the subject of the government formation", the presidency said in a statement.
The decision resolves the question of what would happen after President Ashraf Ghani's term expires on May 22. The presidential elections were initially slated for April 20 but were delayed until July 20, then pushed back again until September 28.