An H3 visa is a temporary visa for individuals to undertake job-related training in the US that is not available in their home country. The training provided cannot be for graduate medical education or for the purpose of providing employment.
Post-secondary students and recent graduates wishing to undertake graduate or medical education in the US may be eligible to apply for a J1 visa as an Intern or Physician and other professionals may be eligible for a J1 visa as a Trainee.