Thirteen opposition parties, baring the Left and the Aam Aadmi Party, protested at Parliament's Gandhi Statue demanding answers on demonetisation.
Among the protestors were leaders from the Congress, the Trinamool Congress and the BSP.
Although the Left did not join the protest, it said that it would mount a separate protest later in the day.
CPI leader D. Raja told the media that "approaching the President is the final option" if Modi did not respond to questions from the opposition.
"Seventy people have lost their lives. Is this a small matter," Jyotiraditya Scindia of the Congress said.