WATCH: Trump addresses UN General Assembly, blasts Iran

Donald J. Trump, President of the United States of America, addresses the general debate of the 73rd Session of the General Assembly of the UN

UNITED NATIONS – US President Donald Trump says Iran is sowing chaos in the Middle East.

He was discussing America's foreign policy at the United Nations General Assembly on Tuesday.

Trump said the US has been justified in scrapping a nuclear deal with the Iranian government.

Since Trump came to power, promising that the world's most powerful country would follow an unashamedly "America First" foreign policy, there have been growing fears about the US commitment to multilateral institutions such as the United Nations.

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In a speech at the opening of the assembly, UN Secretary-General Antonio Guterres said trust in the rules-based global order and among states was "at a breaking point" and international cooperation becoming more difficult, without specifically mentioning Trump.

Trump used his UN address last year to bash the nuclear deal as "an embarrassment," signaling that the United States was ready to walk away.

-    Additional reporting AFP