Washington - Different heads of states have expressed concern over US President Donald Trump's decision not to recertify Iran's compliance with the Joint Comprehensive Plan of Action (JCPOA).The heads of states - who include the United Kingdom, France and Germany - said, in a joint statement, that they are concerned about the implications of Trump's decision, adding that they remain committed to the JCPOA and its full implementation. The JCPOA, also known as Iran Nuclear Deal, is a 2015 deal struck between Iran and five world powers - the US, UK, Russia, France, China, and German. "We, the leaders of France, Germany, and the United Kingdom take note of President Trump's decision not to recertify Iran's compliance with the Joint Comprehensive Plan of Action to congress and are concerned about its possible implications. "We stand committed to the JCPOA and its full implementation by all sides. Preserving the JCPOA is our shared national security interest," the leaders said in a joint statement.They further called on US government to consider the implications of Trump's decision to the US and its allies. On Friday, Trump said he was not yet ready to pull the US out or re-impose nuclear sanctions.Instead, he kicked the issue to congress and the other nation telling lawmakers to toughen the law that governs US participation and to fix a series of deficiencies in the agreement. Those include the expiration of several key restrictions under "sunset provisions" that begin to kick in in 2025, he said.Trump warned that without the fixes, he would likely pull the US out of the deal and snap previously lifted sanctions back into place. Without improvements, he said in a White House speech, "the agreement will be terminated"."It is under continuous review, and our participation can be cancelled by me as president at any time," he said in a speech from the White House.Trump's announcement was essentially a compromise that allows him to condemn an accord that he has repeatedly denounced as the worst deal in American history. But he stopped well short of torpedoing the pact, which was negotiated over 18 months by the Obama administration, European allies and others.Congress will now have 60 days to decide whether to put the accord's previous sanctions back into place, modify them or do nothing. Any decision to re-impose sanctions would automatically kill America's participation in the deal.'Aggressive' rhetoric Russia's foreign ministry criticised Trump's decision, accusing him of using "aggressive and threatening rhetoric". The ministry in a statement said that Moscow "underlines once again that it is unacceptable to use aggressive and threatening rhetoric" and that "using such methods to solve problems that touch fundamental security interests of other countries is bound to fail"'It said Russia reacts "with sadness" to Trump's decision to withdraw his support for the 2015 Iran nuclear deal, but said it expected the accord to be honoured nonetheless. "We view [the decision] as an element of a domestic debate in the framework of US national legislation," it said. "We expect that this step would not have a direct impact on the implementation of the deal.Netanyahu praises TrumpHowever, Israel's Prime Minister Benjamin Netanyahu congratulated Trump on his "courageous decision". "I congratulate President Trump for his courageous decision today. He boldly confronted Iran's terrorist regime," Netanyahu said in a video in English. "If the Iran deal is left unchanged, on thing is absolutely certain. In a few years time, the world's foremost terrorist regime will have an arsenal of nuclear weapons and that's a tremendous danger for our collective future," he said. Netanyahu has repeatedly denounced the deal signed by Iran and six world powers including the United States, which saw sanctions on Iran lifted in exchange for curbs to its nuclear programme.