There is no Consulate of Marshall Islands in Da Nang City, Vietnam.
Also, there is no Embassy of Marshall Islands in Hanoi capital city of Vietnam.
Citizens of the Marshall Islands have three options to apply for a visa to Vietnam. Aside from the e-visa, you also qualify for the Vietnam Visa on Arrival.
Before starting with the process, Marshallese passport holders are advised to prepare a scanned copy of your passport’s bio page (Sample for passport’s bio page) and a digital photo of your face (Photo guide). Please make sure your passport valid for at least 6 months with 2 blank pages.