Hi,
It will make sense for you to come to India 1st. Buy a fresh air ticket from India to these countries. It will be much much cheaper than buying in Qatar. And options in variety of packages out of India are plenty.
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Malaysia Consulate Address: Zone 66, Lusail Street, West Bay, Dafna, P.O Box 23760

Telephone: +974 44836463
+974 44836493
Fax: +974 44836 453

Work days: Sunday - Thursday 8.30 a.m - 4.30 p.m (Consular : 9.00 a.m - 12.00 p.m / 2.00 p.m - 3.00 p.m)
Public Holidays: Friday & Saturday
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Singapore Consulate Address: New West Bay Area (Off Lusail Street), PO Box 24497 Doha, State of Qatar

Telephone: 974-4412 8082, 974-4412 8083
Operational Hours:

For Visa:
9.00 am - 11.00 am (Submission of visa application)
1.30 pm - 3.00 pm (Collection of visa)
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Thailand visa is available on arrival at Suvarnabhumi Airport..

Drop me a line if you need further info...
Yp