The Electronic Privacy Information Center can’t challenge a citizenship question on the 2020 census, a federal appeals court ruled.

EPIC lacks standing to sue because it failed to show that adding the question before publishing a privacy assessment would lead to a harmful disclosure of information, the U.S. Court of Appeals for the District of Columbia Circuit said in a June 28 opinion by Judge David B. Sentelle.

The decision comes on the heels of a U.S. Supreme Court ruling...