The discontinuation is a response to a ruling by the U.S. International Trade Commission, which found that Apple's blood oxygen feature infringed on the patent rights of medical technology company Masimo. The removal of these devices from Apple's website is scheduled for 3 p.m. ET Thursday, and they will no longer be available in Apple retail stores after Sunday. Apple plans to challenge the decision, expressing concern about the potential impact on users relying on the watches' safety and health features.