19 Countries Off Limits for American Travelers: What You Should Know

12. Yemen: War-Torn Nation & Document Breakdown

Why It's Banned: Yemen's ban is directly linked to its ongoing civil war, which leaves its government unable to exert physical control over its territory or sufficiently vet those leaving the country. This profound instability compromises reliable travel document issuance, effectively shutting down most travel for its citizens, who are already facing dire humanitarian conditions and desperately need avenues for escape or assistance.

The following nations face limitations primarily on immigrant visas and certain non-immigrant visas (B-1/B-2 for business/tourism, F/M for students, and J for exchange visitors). Other non-immigrant visas (like H-1B or L-1) may still be accessible but could see reduced validity periods.