I went away for 40 days last year, on my return the immigration officer asked basic questions in thai (name, school name etc) and why I left during classes.

I presented the immigration officer with the “letter of absence” which I got from school. Stating my reason for leaving country during classes and that I will be taking online lessons.

Very reluctantly they allowed me in.

While issuing the letter my school messaged me this

You may deny to enter Thailand.

1) If you cannot speak Thai.

2) If you leave the country many times, or longer than 2 weeks.

@Tod ********

will check with the immigration with all those requirement documents and try my luck and will update.

@Ručman **********

let me give it go then, and see if immigration officer let me do it. Will update the post in coming days with the outcome.

@Tod ********

Thank you this information helps a lot. Will plan accordingly