Russian President Vladimir Putin has said that US and EU sanctions will harm not just Russia but the global economy, reports GHN based BBC.
He said the sanctions were a mistake, going against trade accords and only the UN had the right to impose them.
The sanctions were introduced over Russia's annexation of Ukraine's region of Crimea and its alleged involvement in eastern Ukraine.
Mr Putin was speaking ahead of the G20 summit in Brisbane, Australia, which is to focus mainly on promoting growth.
World leaders including Mr Putin, US President Barack Obama and Chinese President Xi Jinping are gathering for the two-day meeting.
Australian Prime Minister Tony Abbott said leaders would discuss job creation, identifying tax cheats and strengthening the global economy.
Campaigners also want climate change on the agenda, but Australia has been firm in keeping it off.
In an interview for Russia's Itar-Tass news agency, Mr Putin said it would be "pointless" to raise the issue of sanctions at the summit but that he would talk about it if asked.
The sanctions were illegal and harming not only Russia but world trade, he added.
"This contradicts international law, because sanctions can only be imposed within the framework of the United Nations and its Security Council," he said.
Mr Putin added that the sanctions also went against the principles of the World Trade Organization (WTO), which the US had helped set up and was now grossly in breach of.
"This is harmful, and of course is doing us some damage, but it's harmful for them as well because, in essence, it's undermining the entire system of international economic relations," he continued.