The H-3 nonimmigrant visa category allows foreign nationals to remain in the United States temporarily as either a:
Trainee - to receive training in any field, other than graduate medical education or training, that is not available in the applicant’s home country; or
Special Education Exchange Visitor - to participate in a training program regarding the education of children with physical, emotional or mental disabilities.
FAMILY VISA ELIGIBILITY
Spouses and minor children (under the age of 21) of H3 visa holders may apply for an H-4 visa, which allows them to accompany H1-B visa holders during their stay in the U.S. H-4 visa holders are not allowed to work in the U.S.