An H-3 classification applies to an alien who is coming temporarily to the United States:
(1) As a trainee, other than to receive graduate medical education or training, or training provided primarily at or by an academic or vocational institution, or
(2) As a participant in a special education exchange visitor program which provides for practical training and experience in the education of children with physical, mental, or emotional disabilities.
Family members of the H-1B foreign worker are admitted to the United States in the H-4 category. Qualifying family members include only the spouse and unmarried children under 21 years old. H-4 dependents are admitted for the same period of time for which the H-1B foreign worker is admitted. H-4 dependents may alternatively be admitted in other nonimmigrant categories for which they qualify. H-4 dependents may undertake studies while remaining in the H-4 category, however, they may not engage in any form of employment.