"Kim Jong-un has been pretty straight with me," Trump was quoted by Reuters as saying at the White House on Friday (Washington time) after the launch of the projectiles, which marked the seventh such event since late July.
"He likes testing missiles, but we never restricted short-range missiles. We'll see what happens," he said, according to the Associated Press.
Trump earlier said North Korea's leader Kim Jong-un had sent him a letter expressing a "small apology for testing the short-range missiles" and that Kim told him such saber-rattling would stop when the joint exercise between South Korea and the United States is over.
The allies' combined training ended Tuesday.