There is no typical processing time for a K-3 visa, according to the Department of State, Consular Affairs Bureau. Receiving a K-3 visa is a two-step process, including submission of two approved petitions, an application and interview with the recipient of the visa. Additionally, approval requires documentation from the applicant.
Incomplete applications and failure to provide all required and detailed documentation are the most common reasons for delays in processing a K-3 visa. In some cases, after the initial interview by the appropriate consulate with an applicant, some administrative issues come to light and slow the process, explains the Department of State, Consular Affairs Bureau.