If you are a U.S. Citizen, once you file Form I-130, your spouse is eligible to apply for a nonimmigrant K-3 Visa. This will entitle him or her to come to the U.S. to live and work while the visa petition is pending. The Form to file for this benefit is Form I-129F. It is not necessary for your spouse to obtain a K-3 visa in order to come to the U.S. to live and work. Your spouse may wait abroad for immigrant visa processing. However, seeking a K-3 visa can be a method for him or her to come to the U.S. more quickly.