After you have completed the steps on the Immigrant Visa Process on usvisas.state.gov, including paying the necessary fees and submitting the required immigrant visa application form (DS-260), Affidavit of Support, and supporting documents to the National Visa Center (NVC), they will review your file for completeness. Once your case becomes qualified for an interview, NVC will work with us to schedule an interview appointment for you.
The U.S. Embassy in Nouakchott does not process Immigrant Visas. All Immigrant Visas for Mauritanians are handled at the U.S. Embassy in Dakar, Senegal.
You can learn more about the interview process on usvisas.state.gov.