French President Emmanuel Macron wrote ahead of the meeting on his profile: "The American President may not mind being isolated, but neither do we mind signing a six country agreement if need be".
While Europe's leaders have often allowed Germany and France to coordinate a common stance at worldwide gatherings, Conte raised eyebrows at the start of the summit by siding with Trump on the issue of Russia's readmission to their club.
White House officials did not immediately respond to requests for comment on the characterizations by these officials of Mr Trump's remarks or attention to the presentations.
Earlier on Saturday, Trump told reporters it would be "very easy" to make the case for tariffs on auto imports using the rationale that they threaten national security.
Trump's counterparts in the G7 had sought this week to try to find some semblance of consensus with Washington on trade and the other key issues that have formed the basis of the 42-year-old grouping of industrialized nations.
On the subject of Russia, Trump said he thought it would be "an asset" to have the country in what would be the G8.
"No tariffs, no barriers, that's the way it should be", Trump said. Trump told reporters that the countries would have to either lower their tariffs against the US or the USA would stop trading with them.
Moreover, UK Prime Minister Theresa May said that G7 countries agreed to be ready to adopt new restrictive measures against Russian Federation.
Trump revealed that the US team had worked "very well" with the representatives from Pyongyang during the bilateral preparatory talks for the summit.
Trump also repeated an earlier proposal that USA trading partners should drop all trade barriers, including tariffs and subsidies to industries and producers in their own countries. "You know you have to ask President Obama because he was the one who let Crimea get away; that was during his administration", he said.
Larry Kudlow, the president's top economic adviser and a staunch advocate of free trade, said the suggestion of no tariffs led to productive discussions with the other world leaders.
"We're like the piggy bank that everybody is robbing", Trump said at a press conference shortly before leaving the gathering of the United States, Canada, Great Britain, France, Italy, Germany and Japan.
Mr. Macron, feuding with Mr. Trump over US steel and aluminum tariffs on the European Union, tweeted that he and the other six leaders were prepared to turn their backs on Mr. Trump at the summit.
Talks to modernize NAFTA, which started last August, have effectively stalled as Canada and Mexico resist US demands for major changes such as the sunset clause and boosting the North American content of autos made in the three nations.
"He must mean there are 10 things on which we totally disagree", the diplomat said.
"We have a very really good relationship, very special" - Trump insists he's still best buddies with Emmanuel Macron after his latest no-holds barred handshake with the Frenchman.