Speaking on the sidelines of the G7 summit in Japan, Lindner said the global economic outlook was still "fragile" and hoped that parties would not be swayed by short-termism or partisanship.
Lindner's remarks underscore concerns as a meeting between the U.S. President Joe Biden and lawmakers scheduled for Friday back in Washington was postponed. A deal is needed to raise the government's debt ceiling to avert a catastrophic default.
The German finance minister warned that politics was a risk to the global economy and financial market stabilisation.
"That's why we're looking at the United States in particular these days and hoping that an adult decision will be made with regard to the development of American government finances and the associated effects on the global economy," he said.
Elaborating later on what "grown-up" meant, Lindner said it was reaching an acceptable decision that was not dictated by party political considerations or short-term motives.
Speaking to reporters alongside Lindner, Bundesbank chief Joachim Nagel said the European Central Bank would continue to raise interest rates as inflation numbers remained high.
