SOURCE: U.S. Embassy and Consulate in Vietnam
Partial Resumption of Immigrant Visa Processing by U.S. Embassy and Consulate in Vietnam
Beginning Monday June 29, the Consulate will conduct interviews for IR-1, IR-2, CR-1 and CR-2 immigrant visa applicants who had appointments scheduled in March, April and May that were canceled because of COVID-19. Please visit this page to make a reschedule appointment. Please note that currently we are only allowed to interview these four categories; if applicants for other immigrant visa categories make appointments, they will be canceled. Also note that at this time, we are only allowed to issue IR-2 and CR-2 visas to applicants who are under 21 years of age.
* For all immigrant visa applicants other than IR-1, IR-2, CR-1 and CR-2, the Consulate is not conducting routine visa appointments. Please click here to request consideration for an emergency appointment. We will resume routine interviewing as soon as possible but are unable to provide a specific date at this time. We will post instructions for rescheduling interviews for applicants who missed previously scheduled appointments because of COVID-19 cancellations.
* Previously Issued Visas and Visa Renewals: If you already have a U.S. immigrant visa that has not expired, you may still use it to immigrate to the United States. If your immigrant visa has expired due to factors beyond your control, please contact our office here for instructions on how to renew it; there is a fee, and you will need to undergo a new medical examination. Note that we presently cannot renew visas in categories suspended by President Trump’s April 22 Proclamation.

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https://vn.usembassy.gov/partial-resumption-of-immigrant-visa-processing/