"We won't let ourselves be ripped off again and again", she said, referring to the new American tariffs on imported steel and aluminum.
In the past, the US has had low points with Europe.
British Prime Minister Theresa May took a more measured tone, telling reporters she wanted the European Union to use restraint in retaliation against United States tariffs and that the response must be proportionate and legal. Merkel thinks that it is better to set out those differences instead of giving a false impression of unity with a dishonest communique that would say everything's OK.
Canadian Foreign Minister Chrystia Freeland said her country "will not change its mind when it comes to the illegal" application of tariffs.
"Why should I, as President of the United States, allow countries to continue to make Massive Trade Surpluses, as they have for decades, while our Farmers, Workers & Taxpayers have such a big and unfair price to pay?" the President continued.
USA fighter jet crashes off Japan coast
The incident occurred at about 6:00 local time (midnight Moscow time), about 80 km from Okinawa's administrative capital Naha. F-15 fighter jets are twin-engined tactical fighters that were initially envisioned as a pure air superiority vehicle.
But despite hard lobbying, the French leader failed to persuade Trump to stay in the 2015 Iran nuclear deal and scrap proposed tariffs on European steel and aluminium. "Not fair to the PEOPLE of America! $800 Billion Trade Deficit..."
As the heads of the top industrialised democracies embarked on a two-day G-7 summit in rural Quebec, European leaders warned that Trump's stance on trade, climate, Iran and - now - Russian Federation was setting him apart.
"I'm not saying that none of the things he wants will happen", Merkel said in an interview with ARD public television. Trump has pointed to Canadian Prime Minister Justin Trudeau's criticism of him as a reason for withdrawing from the consensus statement.
Mr Trump made the comment at the White House after hours of further escalating his rhetoric against longtime allies over U.S. trade practices.
And he promised a "frank and direct discussion" with Trump in Canada.
Donald Trump, Kim Jong-un to open historic summit with one-on-one powwow
But a few North Korean cameramen, dressed in dark suits, were allowed on the street, just behind the police barricades. Those points were echoed in Monday's media coverage, which stressed that the talks with Mr.
"It's hard, it's depressing this time, but that's not the end" of the Group of Seven, she added.
Doctored images showed the USA president as a petulant child - including memes with Trump overturning a bowl of noodles on his head or clutching a teddy bear as Merkel sternly looks on.
Donald Trump, for his part, told reporters at his bilateral meeting with Trudeau that he thought there would be a joint statement coming out of the summit, though he didn't specify whether he was referring to a final joint communique or to separate side agreements.
Europe will implement counter-measures against USA tariffs on steel and aluminium, German Chancellor Angela Merkel said on Sunday, voicing regret about President Donald Trump's abrupt decision to withdraw support for a Group of Seven communique.
USA trading partners have been furious over President Donald Trump's decision last week to impose tariffs on steel and aluminum imports from Canada, the European Union and Mexico as part of his "America First" agenda. Trump focused his conversation with Macron on German trade for about 15 minutes in the one-hour meeting.
Tropical Storm Bud grows off Mexico's Pacific coast
It's too soon to determine whether this second system will eventually pose a direct threat to parts of Baja California next week. In 2017, the basin saw 18 named storms, 9 of which become hurricanes, with 4 classified as major storms (category 3 or higher).
But no consensus document will hide the damage inflicted by the U.S. leader s aggressive imposition of tariffs on what had been some of Washington s closest allies.