The section from Mahawa to Anuradhapura on the Northern railway line will not reopen as scheduled.
This section has been closed for renovations since January.
Locomotive drivers have raised safety concerns due to the absence of secure level crossings between the Eppawala and Dahaiyagama stations.
As a result, the Yal Devi train, which operates from Colombo, will only travel as far as Mahawa for now.
Renovation work on the Northern Railway line is being funded through Indian loan assistance.