The K-3 Visa is a non-immigrant (temporary visiting) visa for a spouse of a U.S. citizen to come to the US, while his/her permanent stay case is still pending. The K-3 visa must be filed and the visa must be issued in the country where the marriage took place. After the visa process has been completed, and the visa is issued, the spouse can travel to the United States to wait for the processing of the immigrant visa case.
There are two broad categories of US visas:
1. Immigrant visas: For those intending to reside permanently in the United States. (Whether or not they intend to work.)
2. Nonimmigrant visas: This is for people with permanent residence outside the US but who wish to be in the US for a short duration only. In other words it is a Visa for visiting United States temporarily. Reasons could be Tourism or medical treatment, business purpose, Students, Participants in exchange programs, Temporary workers, Performing artists, Professional journalists, and Government representatives, etc.
Temporary Worker Visas:
There are several categories of temporary worker visas. All applicants for such visas must have a petition approved by the U.S. Immigration and Naturalization Service (INS) before applying for the visa.
Registered nurses, persons in a specialty occupation H-1B, temporary or seasonal agricultural workers, temporary or seasonal non-agricultural workers, trainees other than medical or academic, practical training in the education of handicapped children.
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