Singh, India's top junior and seeded in the five to eight bracket, went down 11-8, 4-11, 6-11, 6-11 to Egyptian Marwan Tarek, a press release from SRFI stated.
Tarek had earlier beaten another Indian Yash Fadte in the third round.
Singh will now play in the 5th-8th place matches.
India will take part in the girls' team event which commences on July 25.
Concurrently, a separate international boys Test series involving India, Australia, Malaysia, South Africa and New Zealand would also be held at the same venue.
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