BNP chairperson and leader of the opposition Khaleda Zia arrived at the parliament at 4:26pm after a long absence since March 20, 2011.
She sat in a meeting of the parliamentary party of the opposition where Jamaat-e-Islami MP Hamidur Rahman Azad was also present.
The 18th session of the 9th Jatiya Sangsad (JS) and the budget session of 2013 will begin at 5pm Monday.
President M Abdul Hamid has summoned the session as per Article 72 of the constitution.
In this session, Finance Minister Abul Maal Abdul Muhith will place the national budget for 2013-14 on June 6.
This will be the fifth and the last budget of the Awami League-led grand alliance government.