Does a single entry tourist visa (TR) become void if I leave Thailand before the 60 days are up?

The other thing to note is that from most countries you can get stamped in visa exempt for 30 days - depending on your travel dates outside Thailand this may work - you simply get a second visa exempt entry on your return. Please note that airlines in some countries may want to see you have a return or at least onward ticket to allow you to board the plane to Thailand).

@Li**

did bring up a valid point

@Lea***

IF you come here, get stamped in for 60 days but wanted to go to another country for a few days and come back to thailand you COULD buy a single re-entry permit for 1000baht.

That would keep your 60 day stamp 'valid' so you could leave, come back and be stamped in until that date again.

It doesn't add any days to your 60 day stamp BUT you could enter and use the rest of it.

You can always buy another entry at an immigration office for 1.900 bath.

you are correct. A single entry tourist visa is just that :O It's good for one single entry into thailand and you get stamped in for 60 days, then the visa is used <- meaning you can't use it for entry again..

Leaving before the 60 days is up cancels the entry stamp you got.