There is no Consulate of Montenegro in Da Nang City, Vietnam
Also, there is no Embassy of Montenegro in Hanoi capital city of Vietnam.
Just like with applying for a regular visa to Vietnam, Montenegrin Citizens will need to fill an application form for getting the e-visa. But instead of the actual form, you’ll fill it online.
The application process of the Vietnam e-visa for Montenegrin passport holders is easy and undemanding. So, you won’t have to face much hassle while applying.