"Where is that laundered money and where are those Rs500 billion," he asked the former premier while speaking to the media outside Islamabad High Court (IHC).
Suleman added that the entire world was a witness to what Imran Khan continued to claim during the past few years.
"You malign the institutions here (in Pakistan), but we have been given a clean chit by British National Crime Agency despite all your efforts to get us implicated" he said.
The Sharif family scion further said that while Imran Khan talked about holding others accountable, he was unable respond to the Graff watch and Farah Khan controversies.
Suleman announced to not give the PTI chief "any space" in the future, saying he'll be brought to justice for his wrongdoings.