In a letter to Secretary of State Rex Tillerson, Mr Corker announced he would not clear any more weapons sales in the region until the U.S. has a "better understanding of the path to resolve the current dispute and reunify the [Gulf Cooperation Council]".
The influential senator said that his committee would block lethal military weapons sales to GCC states - Saudi Arabia, Kuwait, United Arab Emirates, Qatar, Bahrain and Oman - until there was "a better understanding of the path to resolve the current dispute and reunify the GCC".
Corker's committee and its counterpart in the lower chamber, the House foreign affairs committee, have the ability to review arms deals once the executive branch officially proposes them.
Saudi Arabia, the UAE and Bahrain severed all diplomatic and economic relations with Qatar on June over its alleged links to terror groups.
They accused Qatar of aiding terrorist groups and Iran - charges it denied.
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In a letter to Secretary of State Rex Tillerson on Monday, Corker said he "could not have been more pleased" by President Donald Trump's recent trip to Saudi Arabia and the summit meeting with heads of other Gulf Arab states.
The Congress can, under US Law, oppose any sale of weapons to a foreign country.
The paper added that Tillerson and Corker have forged a strong working relationship in the secretary's first few months on the job, and congressional and administration officials said the senator's letter was a high-profile example of how Congress could use the arms-sales notification process to influence policy. Tillerson also said a "lowering of rhetoric would also help ease the tension". If they take no action, the sale moves forward.
Speaking at the same event, the Iranian foreign minister Zarif said the countries who blamed Iran or Qatar for terrorism were trying to avoid taking responsibility for their own failures in addressing the demands of their own people.
Meanwhile, Tillerson on Sunday said in a statement that Qatar is reviewing demands by neighbouring Gulf nations to end the weeks-long diplomatic dispute.
But his Secretary of State, Rex Tillerson, acknowledged on Sunday that some of the demands issued by its neighbours would "be very hard to meet" and called for "dialogue leading to resolution". The aide said it also would not affect the delivery of a $500 million package of precision-guided munitions for Saudi Arabia's campaign in Yemen that created a controversy in the Senate earlier this month.