"A" visa category is reserved for "Foreign Government officials" mainly foreign diplomats and their supporting personnel and staff to the United States, including their immediate family members. There are multiple sub-class under the "A" visa class, namely:
- A-1 for foreign diplomats, mainly: ambassadors, public ministers, career miplomatic or consular officers and member of the immediate family members;
- A-2 for Other foreign government officials or employees, and members of their immediate families.
- A-3 for Attendants, servants, and or personal employee of A-1 and A-2, and members of immediate families.
- Many of them enjoy diplomatic immunities.