Can I leave Thailand and come back during my 3-month tourist visa stay?

NO

If a history of spending a lot of time here and you aren't married to a thai or under 50, best of luck

If you dont have a history of staying in thailand long term the past 2 to 3 years, eg covid or ed extensions and If you only want to bounce in and out of Thailand for 3 or 4 months with side trips a regular visa exempt 30 + 30 extension should be fine 2x, not clear how much time you spent here since 2020?

If you want to stay in Thailand longer, you can extend for 30 days...if you want to go to other countries that original entry is void and finished

No, it's single entry 60 day stamp, how hard is it to understand the rules

No

The Tourist Visa is valid for 90 days. Which means you can enter Thailand up to 90 days after the Visa is issued. The duration is 60 days. A 30 day extention is available. However, if you plan to travel to other neighboring countries then plan to leave before the 60 days and return on a 30 day Visa exempt entry. If you are visiting multiple neighboring countries then you could just enter Visa exempt and leave before 30 days each entry. No Visa required.

Arrrrr... Folks, why argue? If he truly believes this is a 90 days TV then let him stay 90 days. That's all. Let him believe whatever he wishes to believe...

@Colin *****

there is no 3-months Tourist Visa.

If you mean the 60-days Tourist visa, which can be extended on Immigration ONCE for 30 more days, summing up to 90 days stay, then you should note the following advice:

The 60 Days tourist visa is a “SINGLE ENTRY” category tourist visa.

This means you can only enter Thailand ONE TIME and receive 60 says “stay permit”

Theoretically, you could buy a re-entry permit for 1000.- Baht, which would keep your 60 days stay permit alive, if you left Thailand and re-enter during the period of these 60 days.

The question is, will this make sense or not? Will it be fit to your travel plans?

You can stay the first 60 days, then leave Thailand, have a holiday in a neighbouring country and re-enter “visa-exempt”. This will give you 30 days stay permit, which you can extend on Immigration for 1900.- THB for 30 more days.

After this your options are limited, theoretically you can add one more 30 days “visa-exempt” entry by doing a ”border run”

Come in visa free if you are going to be leaving so soon

The normal tourist visa is single entry. You can get the multi entry variant if you want to leave and return. Alternatively, just use 30 day visa waivers.

Would an exit stamp also be needed?

There's no 3 month tourist visa.

A tourist visa will give you permission to stay in Thailand for 60 days. The day you arrive is counted as day 1.

You are also able to apply for a 30 day extension, potentially giving you 90 days total.

If you want to leave and return and keep your existing stamp from being cancelled when you leave, you would need to purchase a re-entry permit before you leave.

Is it a 60 day single entry Tourist visa you're talking about? If so, when you leave the country the stamp is void. You can probably purchase a re-entry permit before leaving, generally used by people with long term visas but I assume they allow it for 60 day Tourist visa as well.

There's a multi entry tourist visa, that allows you to leave and everytime you re enter you get a new 60day stamp. Or if you hold a passport from a visa exempt country, you can enter that way and be stamped in for 30 days.

I think the tourist visa is 60 days and you can extend for 30 days. If you leave you can come back in on 30 day visa exempt then extend again for 30 days

There is no 3 month tourist visa. It is what Tony said.

You can get a 60 tourist visa and extend 1 time for an extra 30 day at a cost of 1900baht . However it is only a single entry only .