WASHINGTON — The Supreme Court on Monday declined to hear challenges to “net neutrality” regulations adopted in 2015 by the Federal Communications Commission during the Obama administration and upheld by a federal appeals court the next year.

The 2015 regulations had barred broadband providers from blocking websites or charging for higher-quality service or content. The rules allowed the federal government to regulate high-speed internet delivery as a utility, like phone service.

Three members of the Supreme Court — Justices Clarence Thomas, Samuel A. Alito Jr. and Neil M. Gorsuch — said they would have instead vacated the appeals court decision as moot, presumably because the commission reversed itself last year, after a change in its membership.

[Net Neutrality has officially been repealed. Read how this could affect you.]

The F.C.C.’s reversal reflected the Trump administration’s deregulatory philosophy. The commission’s chairman, Ajit Pai, said the change would benefit consumers because broadband providers could offer them a greater variety of services. His two fellow Republican commissioners also supported the change, giving them a 3-to-2 majority.