Belarus lifted a cap on the number of U.S. diplomats allowed in the country. Visa services have been significantly restricted at the U.S. Embassy in Belarus for the past decade.
The lifting of the cap means that starting February 1, 2019, Belarusian citizens and residents of any age may apply for any category of nonimmigrant U.S. visa at the Embassy in Minsk.
Embassy announcement: https://by.usembassy.gov/visas/