The French government is facing a no-confidence vote after Prime Minister Michel Barnier pushed through budget measures without parliamentary approval.
If the measure passes on Wednesday, as is expected, it would mark the first time a French government has been removed this way in more than 60 years.
The National Assembly is due to vote after debating two motions introduced by the left-wing camp and far-right nationalists, which together count more than 330 politicians. A no-confidence motion requires at least 288 of 574 votes to pass.
The far-right National Rally (RN) of three-time presidential candidate Marine Le Pen is expected to vote for the motion put forward by the left, giving it enough numbers to pass.
The session is due to start at 4pm (15:00 GMT), with voting expected hours later. President Emmanuel Macron is set to return to France from a state visit to Saudi Arabia during the day.
Macron, whose term ends in 2027, has dismissed the threat of his potential removal from office amid the turmoil, saying such discussions were “make-believe politics”.
“I’m here because I’ve been elected twice by the French people,” Macron was quoted as saying by French media. “We must not scare people with such things. We have a strong economy.”