Trump said the reports were "false news" and said the United States was prepared to send more than that if necessary.
The New York Times has attributed to administration officials that the administration has revised plans to deal with Iran, including sending about 120 thousand troops to the Middle East, equivalent to the size of US forces that participated in the Iraq war in 2003.
Acting Defense Secretary Patrick M. Shanahan presented a top-level security plan to a top security official last Thursday, including sending the number of troops if Iran attacked US forces or accelerated the work in nuclear weapons, the newspaper said, quoting officials.
Tension between Iran and the United States has grown since Washington pulled out of a nuclear deal in 2015 aimed at curbing Tehran's nuclear activities and re-imposing tough sanctions on Iran.
President Trump is trying to force Tehran to agree to a broader arms control agreement and send an aircraft carrier and B-52 bombers to the region in the face of what US officials said were threats to US forces.