On March 18, 2020, USCIS announced offices temporarily closed to the public.
Screenshot from USCIS Website
Visit https://www.uscis.gov/about-us/uscis-office-closings to check the latest status of USCIS Office near you. You can also share your experience with USCIS offices in the Comments below.
Thanks for the info. My appointment is March 19th. Do I need to reschedule?