The U.S. president has recently whacked all the other members of the G7 with hefty steel and aluminum tariffs and is threatening to also impose tariffs on auto imports, which would also hit them hard.
Canadian Prime Minister Justin Trudeau closed the summit by issuing a strong rebuke to Trump's trade threats, calling them "kind of insulting" and saying they would be met with retaliatory measures from July.
The prime minister said: 'Canadians are polite, we're reasonable, but we also will not be pushed around'.
Meanwhile, the European Union - the world's largest trading bloc - announced last week it would impose retaliatory tariffs on the USA beginning in July, over Washington's duties on steel and aluminum imports from Europe.
A German government official said the plan would see direct talks between the European Union and the United States start straight away, and last around two weeks, focused on how much, or whether, European Union trade policy endangers USA national security interests.
Trade dominated the two-day summit that began on Friday with leaders of Germany, France, Japan, Canada, Britain and Italy returning to the topic repeatedly in meetings, at a lavish dinner and by a fireside pit late into the evening.
"We're like the piggy bank that everybody's robbing ― and that ends", the president said. Trump said. "Well, I think that very quickly I'll know whether or not something good is going to happen".
G7 finance chiefs lash out at United States metals tariffs
Trudeau said that the USA has a $2bn billion surplus on steel with the U.S. , and was "very much aligned" on the issue of China . Trudeau said Thursday that the process imploded after Vice President Pence demanded that a renewed deal expire in five years.
The US president had earlier called for Russian Federation - which was suspended from the group in 2014, following Moscow's annexation of Crimea, and chose to leave permanently in 2017 - to be readmitted in the interests of realpolitik.
He said he suggested cutting all of the tariffs, duties and even government subsidies among the G7 countries, and said other leaders would "go back to the drawing board and check it out".
When Trump was pressed about the annexation of Crimea, he placed the blame on President Barack Obama for failing to handle the situation.
WATCH: Merkel says joint communique on trade coming from G7, but still gaps with U.S.
The announcements come as Mr. Trump seeks to make headway on the deep USA trade deficit, saying the country has been taken advantage of for too long, and he is fighting back.
Trump called the summit a "one time shot" for Kim, but expressed optimism at the beginning of talks with the North Korean regime.
I don't know where to go with this dog bites man metaphor but boy isn't this a insane world we live in! In a statement at the time the countries, which include the U.S., France, Canada, Germany, Italy, the United Kingdom and Japan, condemned Russia's actions as "illegal" and in "contravention of worldwide law".