Sri Lanka Cricket Development XI trailed by 65 runs at the end of the third day of the four-dayer against GP-BCB National Cricket Academy in Dambulla yesterday.
Masmulla made 118 as the hosts made 376 for six, made in 94 overs, chasing the visitors' first innings score of 441 made in the first two days.
Jeevan Mendis added 87 while Nadira (6) and Akalanka (24) were unbeaten at stumps.
Marshal Ayub captured two wickets for 16 runs with his part-time legspin while Farhad Hossain, Suharwardi Shuvo, Mahbubul Karim and Rubel Hossain took one wicket each.
On the first day, Farhad Hossain struck a useful half-century as GP-BCB NCA built a huge first innings total.