“The times in which we could completely depend on others are on the way out. I’ve experienced that in the last few days,” Merkel told a crowd at an election rally in Munich, southern Germany.
“We Europeans truly have to take our fate into our own hands,” she added.
While Germany and Europe would strive to remain on good terms with America and Britain, “we have to fight for our own destiny”, Merkel went on.
Special emphasis was needed on warm relations between Berlin and newly-elected French President Emmanuel Macron, she said.
The chancellor had just returned from a G7 summit which wound up Saturday without a deal between the US and the other six major advanced nations on upholding the 2015 Paris climate accords.
Merkel on Saturday labelled the result of the “six against one” discussion “very difficult, not to say very unsatisfactory”.
Trump offered a more positive assessment on Twitter Sunday, writing: “Just returned from Europe. Trip was a great success for America. Hard work but big results!”