Which visa is available to my Thai fiancee or Thai wife or husband?
The K1 visa is a single entry visa valid for 90 days available to your Thai fiancee when entering the USA with the express purpose of getting married. The K3 visa on the other hand is a 10 year “multiple entry visa”which is used by a foreign spouse of a US citizen. The K3 visa holder being your spouse can apply for an adjustment of status to obtain permanent resident status in the US.