Hi folks,
I have SETV with 3 months of validity to enter the country before April 8th. I won't be able to do that. Is there any option to extend the visa or if I want to enter later I have to apply for a new one?
Any negatives I will have with the embassy when applying again, created by me not using the one they already gave me?
TLDR : Answer Summary
If you cannot enter Thailand before the expiration date of your SETV, you cannot extend the validity of your unused visa. You will need to apply for a new tourist visa. Generally, there should not be any issues reapplying for a new visa, especially if you do so via an e-visa, but it's advisable to check with your embassy for specific requirements. Some embassies may have a limit on the number of tourist visas you can receive in a year.