I am adding this comment as a point of clarification or discussion, not to challenge anyone and certainly not to try to prove anyone wrong.
"...countries which make up South Asia are Afghanistan, Bangladesh, Bhutan, India, Maldives, Pakistan, Nepal and Sri Lanka. Sometimes Myanmar (Burma) is also included. They are linked by the South Asian Association for Regional Co-operation."
Check with Lanna Care Net. They may be able to assist or provide guidance how to help the person in need of a repatriation - but maybe not to get someone into Thailand to assist.