Emmanuel Macron is looking for a new prime minister after MPs ousted Michel Barnier in a no confidence vote on Wednesday.
Lawmakers from Left and Right tabled the motion after Mr Barnier forced through his budget without a vote.
Mr Barnier, a Macron ally who became prime minister barely three months ago, will become the shortest-serving prime minister in modern French history when the president approves his resignation.
President Macron is due to address the nation at 7pm GMT on Thursday.