On the 6 month METV, is there an out of Thailand duration period regulation when doing the border runs? E.g. Can I do my first 2/3 months in Thailand, then go to another country for a few months (say 2-3 months) then come back and start the second portion of that visa no problems?
TLDR : Answer Summary
The 6-month Multiple Entry Tourist Visa (METV) allows for extended stays in Thailand, but it's important to understand that the visa duration begins on the issuance date and does not stop while you are outside the country. You can spend 2-3 months in Thailand, then leave for a longer duration, as long as you re-enter Thailand before the "enter before" date indicated on your visa. Each entry can potentially give you additional stays and extensions. However, extending your stay in Thailand locally is essential if you want to remain longer than the initially granted period. Always check the expiration on your visa before planning extended travel.