He said that demonetisation was "not a good" initiative and if he were the prime minister he would have thrown the proposal in a dustbin.
Gandhi was speaking in Malaysia with an "enthusiastic gathering" of the Indian diaspora in Kuala Lumpur.
Asked how he would have rolled out demonetisation differently, Gandhi said: "if I was the Prime Minister and somebody would have given me a file with demonetisation written on it, I would thrown it in the dustbin, out of the door and into the junkyard."
"That is how I would have rolled it out because that is what I think should have been done with the demonetisation which was not good at all," he said.
Congress has been very critical of Demonetisation since its roll-out.
Earlier at the University of California, Gandhi had called the move as " reckless and dangerous" decision taken by Prime Minister Modi.