Europe is finding it hard to follow the actions that U.S. President Donald Trump has taken on global trade, a top European Union (EU) official told CNBC Saturday at the European House Ambrosetti Forum.

Trump has taken several unilateral actions deemed by Europe as damaging to global trade. The president's comments on Twitter as well as sudden decisions to impose new tariffs on imported goods are "quite unconventional" and difficult to understand by European policymakers.

"Sometimes, at least for the Europeans, it is a little bit difficult to follow," Jyrki Katainen, Vice President of the European Commission told CNBC's Steve Sedgwick.

According to the former Finnish prime minister, Trump should use the rules under the World Trade Organization (WTO) to settle all the disputes affecting the U.S.'s trade deficit.

"President Trump is using quite unconventional methods on trade…but there's been a lot of words, little implementation, which is good," Katainen said.

Since the start of March, the rhetoric involving global trade has toughened after Trump's decision to impose metal tariffs, including on its own allies. Since then, a couple of countries have avoided the higher duties, including Europe and Canada, but others like Japan and China haven't.