All foreign teams will be quarantined for 14 days on arrival.
Vietnamese coach Truong Quang Vu will pick four players for the tournament in May.
Vietnam have been in Group III since 2003. After topping it in 2018, they failed to get promotion to World Group II after losing 4-0 to Morocco in the play-offs last March.
With home advantage, Vietnam again hope to reach the play-offs next year.