What are the limitations of a K-3 or K-4 visa?
DHS only admits K-3 or K-4 visas holders for a two-year period. K-3 or K-4 visa holders may apply to USCIS for an extension of status in two-year increments as long as the marriage-based I-130 visa petition or a corresponding application for adjustment of status or visa application is still pending adjudication.