Bangladesh lost to Yemen 0-2 goals in their Group E match of the AFC Under-16 Championship Qualifiers at the Grand Hamad Stadium in Doha on Friday.
Yemen, who beat hosts Qatar 6-1 in their opening match, found the going tough against their South Asian opponents, especially in the first half.
But a penalty goal few seconds before end of the first half, converted by defender Sultan Yousef Thabit, and another goal in the stopgap time after 90 minutes by Osamah Samer Al Baadani ensured the victory for Yemenis.
Bangladesh coach Mustafa Anowar Parvez said, "We tried to play our game throughout. We played very well, especially in the beginning, but two defensive mistakes cost us the game."
"We'll try to do our best against Qatar. Every game is a new experience for our boys," Parvez said at the post-match press conference.
Bangladesh will take on Qatar in the last match of the group on Sunday.