The White House announced his travel plans after French President Emmanuel Macron and Canadian Prime Minister Justin Trudeau signaled they will use the event to take a stance against new USA tariffs on steel and aluminum imports.
After the contentious salvos on social media and the Trudeau-Macron news conference, the White House announced Trump would depart the summit at 10:30 a.m. Saturday, following the session on women's empowerment.
"Maybe the American president doesn't care about being isolated today, but we don't mind being six, if needs be", Macron added.
"Because these six represent values, represent an economic market, and more than anything, represent a real force at the worldwide level today", he said. "1812", one Twitter user wrote in response to the reports.
Trump is expected to hold separate bilateral meetings with Trudeau and Macron, who have presented a united front ahead of the G7, with the French president tweeting of his country's "convergence" with Canada on Wednesday.
In a second tweet Thursday evening, Trump said Trudeau "is being so indignant, bringing up the relationship that the USA and Canada had over the many years and all sorts of other things". "It will start to hurt American workers, the cost of raw materials will rise and industry will become less competitive".
Canada's Prime Minister Justin Trudeau (right) shakes hands with French President Emmanuel Macron during a meeting in Trudeau's office on Parliament Hill in Ottawa, Ontario, on June 6.
Macron, meanwhile, threatened to exclude the US from the annual joint statement issued at the end of the G-7 summit.
Macron, who appeared to have built a warm relationship, said the "G6" leaders would not spark a fight at the summit.
US President Donald Trump is not really fan of British Prime Minister Theresa May.
White House officials said Trump in recent days had bristled at attending the summit, where he is set to be challenged face-to-face on his policy decisions. The EU trade surplus with the U.S. is $151bn, and Canada keeps a farmers and others out. "I think we've done everything we can and put everything on the line", he said. The European Union also attends.
Trump withdrew from the Joint Comprehensive Plan of Action initially signed between Iran and a group that included China, Russia, France, Germany, the U.K. and the United States.
The globalised economy they helped build had both winners and losers but, until Trump's election, the United States was seen as the system's uncontested leader and a major beneficiary. When Trudeau asked how Canada, a longstanding ally, could be a threat to the U.S., Trump snarkily replied with a reference to the War of 1812, saying: "Didn't you guys burn down the White House?"
Things have been pretty insane in American worldwide relations recently with Donald Trump trying to meet Kim Jong Un, pulling out of the Iran deal, trying to renegotiate NAFTA and then slapping "national security" tariffs on everybody.
This marks Trump's second summit of the G-7, an informal gathering that meets every year under a rotating chairmanship.