I don't think you can obtain a Mongolia tourist visa in Singapore. If I'm not wrong, only the embassy in Japan and China can issue the visa.
However you may be able to get clear information from the office in Singapore.
I would try to call first because not sure whether the email address is correct
Office Hours are 9am to 5.30pm
Consulate-General of Mongolia
600 North Bridge Road
#24-08 Parkview Square
Telephone : 63480745
Fax : 63481753
E-mail : email@example.com
#2 wombatfuz has been a member since 30/12/2009. Posts: 38