The American Psychological Association, which sets standards for professional training in mental health, has voted to suspend its requirement that postgraduate programs show a commitment to diversity in recruitment and hiring.

The decision comes as accrediting bodies throughout higher education scramble to respond to the executive order signed by President Trump attacking diversity, equity and inclusion policies. It pauses a drive to broaden the profession of psychology, which is disproportionately white and female, at a time of rising distress among young Americans.

The A.P.A. is the chief accrediting body for professional training in psychology, and the only one recognized by the U.S. Department of Education. It provides accreditation to around 1,300 training programs, including doctoral internships and postdoctoral residencies.

Mr. Trump has made accrediting bodies a particular target in his crusade against D.E.I. programs, threatening in one campaign video to “fire the radical Left accreditors that have allowed our colleges to become dominated by Marxist maniacs and lunatics” and “accept applications for new accreditors.”

Department of Justice officials have pressured accrediting bodies in recent weeks, warning the American Bar Association in a letter that it might lose its status unless it repealed diversity mandates. The A.B.A. voted in late February to suspend its diversity and inclusion standard for law schools.

The concession by the A.P.A., a bastion of support for diversity programming, is a particular landmark. The association has made combating racism a central focus of its work in recent years, and in 2021 adopted a resolution apologizing for its role in perpetuating racism by, among other things, promulgating eugenic theories.