Say that you are battling mental health issues. You have had therapy for some time now and the psychiatrist has recommended to immediately focus on yourself since the psychiatrist has diagnosed you as heavily suicidal.
Because of this you are not able to work anymore and you need to leave immediately ( notice period of 1 week for kts only) to focus on yourself.
Ideally nobody will say anything on this since this is very serious issue.
If they dont, tell them repeatedly that i am suicidal, have held these thoughts inside for far too long and may take action if not given proper care ( need to go back to family immediately so that there is no risk of you harming yourself)