The minister said opposition wanted to hold discussion first on the corruption cases which were made against their leaderships during their governments.
The Pakistan Democratic Movement (PDM) chief was formally invited by former President Asif Ali Zardari during their telephonic conversation.
On behalf of Fazlur Rehman, a five-member delegation of the party including Abdul Ghafoor Haideri, Siraj Ahmed Khan, Abdul Razzaq and Saud Afzal will attend the rally.
NAB, under Anti Money Laundering Act 2010, sought out tax details of Asif Ali Zardari, his sister Faryal Talpur, brother-in-law Mir Munawar Ali Talpur, his son and party chairman Bilwal Bhutto Zardari, and his daughters Bakhtwar Bhutto Zardari and Aseefa Bhutto Zardari.