WASHINGTON — The Trump administration has sent the American Bar Association into exile, ending the group’s semiofficial role in evaluating candidates for the federal bench.

In a statement on Friday announcing the development, Linda A. Klein, the group’s president, said it had provided prenomination evaluations of potential judicial candidates to every administration since that of Dwight D. Eisenhower, with the sole exception of that of George W. Bush.

The bar association recently gave its highest rating to Judge Neil M. Gorsuch, President Trump’s Supreme Court nominee. The administration and Republican senators have repeatedly relied on the endorsement as proof that Judge Gorsuch deserved to be confirmed.

Donald F. McGahn II, the White House counsel, notified the group of the decision to cut them out of the vetting process in a March 17 letter to Ms. Klein.