When macron shook hands with people, the guy sang a few lines from the hymn of the socialists "the Internationale" and asked the President: "How you doing, Manu?", to which the President retorted: "No".
The president scolded him for not calling him "sir" or "Mr President" to which the teenager replied: "Sorry, Mr President".
People have been quick to praise how the President handled the situation, noting his calm and encouraging approach at correcting the youngster.
Macron visited Fort Mont-Valérien near Paris on Monday for the 78th anniversary of late French General Charles de Gaulle's resistance call, where hundreds of French Resistance members were executed during World War II.
"You're here at an official ceremony and you should behave", he said, as the student stood stone-faced, clad in a leather jacket.
Last week his office released a video in which the President said that the French spend "insane amounts of money" on social security.
In the run up to the 2017 presidential election, Macron told a factory worker who had accused him of being a man in a suit that the "best way to pay for suit is to get a job".
"You do things in the right order".
"The day you want a revolution, first you have to learn to get an education and feed yourself, okay?" he said.
The awkward encounter was captured on video and shared online. "And then you can lecture others".
The French president later tweeted: "Respect is the minimum in the Republic - especially on June 18, especially in the presence of the Companions of the liberation".