Will my DTV application be terminated if I enter Thailand before it is approved?

You need to remain in the country you applied in until the end of the process or youl be rejected for not being in the country of application. So if youve already flew out of the country you've lost your application and the fee. My best advice is fly to a nearby country like Vietnam or Malaysia and apply again there. It will cost you another 10-15k baht and you need to wait there until it's finished. They specifically look for proof that your still in the country you applied in. I had to spend a month in Laos waiting for mine.

If I were you, ide do this...

Enter Thailand on visa exempt entry (60 days), then if you want longer than that fly to a neighbouring country like the ones mentioned above and do it all again and don't leave that country until it's approved.

You can still be accepted by a other embassy if you got rejected by one in another country so your fine to apply again. I would be surprised if they still issue the visa on the old one but if your lucky maybe they won't realise you left the country.

You’ve lost your money - unless you have a flexible fare and can change the date.

You cannot leave the country you've applied at for your visa. That could lead you to a visa cancellation, even if that gets approved in first place. The immigration is getting more strict at the border and if they decide to do the math, you'll be out

If they ask for extra documents, specifically a copy of every page in your passport, including blank pages, then you are in trouble, as has happened to a number of people.

Is it so hard to wait a bit? It’s better for your record and no risk

You aren't supposed to come to Thailand before the approval of your DTV. You may risk to lose your money.

Technically, it's not allowed. You're to stay in the country you applied till the end of the process.

But there have been people who got away with similar situations, who entered Thailand mid-process, still received the visa and left and re-entered without any issue.

But it doesn't mean everybody will get lucky all the time like that.

Yes, thanks for your donation.

It will get terminated if they find out