Germany's President Frank-Walter Steinmeier said the international community will have to deal with a disregard by the new U.S. administration for established diplomatic rules.

"The new American administration has a very different world view to ours, one that has no regard for established rules, partnership and grown trust," said the German head of state, whose office is largely ceremonial.

"We have to accept that and we can deal with it. But I am convinced that it is not in the interests of the international community for this world view to become the dominant paradigm," he added, speaking at the Munich Security Conference on Friday.