Le Pen said that her party would send 'by far' its highest number of MPs to the next National Assembly.
All opinion polls in recent days converge toward a win for the 44-year-old pro-European centrist, yet the margin over his nationalist rival varies broadly, from 6 to 15% points, depending on the polls
The two candidates must make their final pitches to the French electorate before campaigning for the presidential runoff is legally required to end at midnight.
Wrapping up a campaign that experts have seen as unusually dominated by discriminatory discourse and proposals targeting immigration and Islam, French voters head to polls on Sunday.
Far-right presidential candidate Marine Le Pen has close ties to Russia and wants to weaken the EU and NATO, which could undercut Western efforts to stop the war in Ukraine.
France's Le Pen warns against sending weapons to Ukraine; Germany irritated by snub of a presidential visit
She also confirmed that if she unseats President Emmanuel Macron in France's April 24 presidential runoff, she will pull France out of NATO's military command.
Both Le Pen and her father, Jean-Marie, have long been a favorite target of irreverent coverage by the evening chat, entertainment, and news show on channel TMC.
With its potential to reshape France's post-war identity, especially if Le Pen wins, the election has wide international significance. A Macron victory would be seen as a defeat for European populists
President Emmanuel Macron is seeking a second five-year term, with a strong challenge from the far right and seeking to counter nationwide voter apathy.
Polls predict that Macron will lead Le Pen by a handful of percentage points in round one, with the top two going through to a second-round on April 24.
Both Eric Zemmour and Marine Le Pen want tougher rules on immigration, including less state aid for migrants, oppose wind farms and want more support for nuclear energy.
The rally, which was initially to take place in a Paris concert hall, has been moved to a bigger exhibition centre in a northern suburb of the capital.
A far-right leader praised by Donald Trump; a scandal-hit conservative; a 39-year-old former investment banker; and a leftwing radical who campaigns by hologram.
Far-right leader Marine Le Pen and centrist Emmanuel Macron are the favourites to progress to a run-off on May 7.