Do US passport holders need a visa for business trip not more than 3 days?

Dear Angeline,

Thanks for your asking

We would like to infrom that  US passport holders need to get visa to enter Vietnam and we cannot process business visa for multiple entries in this time. Thus, we will process tourist visa for you. However, you can use it to enter Vietnam to attend to meeting or convention, except to work at offshore.

If you want to get Visa on Arrival,  please apply visa online in this link: http://www.vietnam-evisa.org/apply-visa.html

After 2 working days, we will send you approval letter and give you instruction how to get visa stamp at Vietnam airport.
You just do following our instruction and can get visa stamp at Vietnam airport normally