Can my husband add me as a dependent on his DTV visa application in Thailand?

No because he has already listed his lover….

Depending on the consulate you use will determine in what order you apply. At a walk-in consulate you can generally submit both applications at the same time, using the e-visa website for an online consulate application you'll likely need to submit his first and once his is approved you can reference his DTV visa number and submit your application as dependant with proof of marriage.

If he gets the DTV then you can apply for one as a dependent. Depending on the embassy or consulate you use you may or may not be required to show 500k in a bank in your name. You’d need to check their website for specifics.

Yes, He can apply depended DTV visa for you. you need to show 500k bht in your bank account too.

no