@missmyboy So very sorry to hear this, a beyond difficult, heart felt pain situation.
Do you have relatives there he could be staying with? Does he have friends there? Hope his living situation is safe for him.
I have no idea what the mental health system is like in the Philippines. If you find an address where he is staying perhaps a crisis mental health team could reach him for an evaluation. Or if you can manage to find contact with relatives or friends he may be staying with. Do you feel he is living on the streets? Obviously he is delusional, paranoid and has a thought disorder. I am not a psychiatrist but he could be experiencing paranoid schizophrenia. A very serious mental health disorder. If it turns out it is possible to have him mentally evaluation in the Philippine make sure the "contact" person initiating a psychiatric call tell the team he IS a danger to himself...which he is!
He belongs, right now, under inpatient psychiatric care. Especially so if he was taking his psychiatric medications before he left and, now, obviously not. But if all I wrote is completely undoable for you...yes, pray for him. And you must take care of yourself! You must!
It is very possible he may return home. And you need to be in top mental and physical health to help him. I certainly feel for you. So much is out of our control when our children are adults and find themselves in serious trouble. So very often are hands are tied due to HIPPA laws and the like. Don't give up hope...this situation will eventually change - by its very nature, it will. Blessings.