Tanbir Hossain, Foysal Ahmed Fahim and Fahim Morshed scored one goal each for Bangladesh.
Defender Tanbir Hossain opened Bangladesh’s account in the very first minute with a header (1-0).
Bangladesh maintained their 1-0 lead till 76th minute before the midfielder Fahim Morshed doubled the margin in the 77th minute by a long range shot outside the box (2-0).
In the 86th minute, forward Foysal Ahmed Fahim sealed the fate of the match for Bangladesh scoring the 3rd goal by a ground shot inside from the box (3-0).
SAFF runners-up Bangladesh team put in the three-team Group B along with India and Sri Lanka while Group A comprises of defending champions and hosts Nepal, Maldives and Bhutan.
In the remaining group match, Bangladesh team will play their giant neighbor India on September 23 at 3:15 pm (BdST).
Top two teams from each group will play semifinals on September 27 while the final match will be held on September 29 at APF Stadium.
Bangladesh: Shanto Kumer Ray, Sadekujaman Fahim, Yeasin Arafat, Tanbir Hossain, Kazi Rahad Mia, Maraz Hossain, Md Jamir Uddin, Foysal Ahmed Fahim, Md Ridoy, Fahim Morshed, and Naiyem Hossain (Amir Hakim Bappy).
Sri Lanka: M Pirasanth, P Rexson, Shishan Prabuddha, M Mushfir, Shenal Sandesh, Rumr Razaa (H A Deshan), SM Kursheeth, Thalal Shihab (M Sajid), Abdul Basith, M Mursith.
Referee: Abdulla Sathir (Maldives)