The United States and Turkey have both suspended all non-immigrant visas effective immediately on October 8, 2017. The indefinite suspension prevents Turks from traveling to the US, and vice versa, on non-immigrant visas, which include tourist, business, student, and official/diplomatic visas. This applies to all sticker visas, electronic visas, and border visas.
The suspensions were prompted by the recent arrest in Istanbul of a U.S. consulate employee, who is a Turkish national. The arrest was made in connection with the employee’s alleged ties to cleric Fethullah Gulen, who has been in exile from Turkey and living in the U.S. since 1999. The Turkish president has blamed Gulen for last year’s military coup attempt in the country, and has pushed for the US to extradite him.