International guests who plan to attend the Commencement ceremony may need to apply for a U.S. Visitor Visa (B-2).
Information about applying for a visa is available at the U.S. Embassy or Consulate where the visa application will be made. Applications will need to show that the visit to the U.S. is temporary, that there are adequate finances to cover the trip, and that they intend to return to their home country (proof of ties such as job, family, property or other commitments).
You might need to send supporting evidence for your guest: