Conforto told Mets staff the wrist issue is not compromising him at the plate. He will be examined by Mets doctors on Monday in New York.
Conforto struck out as a pinch hitter in the ninth inning Sunday and is now hitless in his last 11 at-bats. He is hitting .096 (5-for-52) since May 24. Asked if the wrist issue is affecting his performance at the plate, Conforto said postgame: "I don't feel it when I'm swinging. ... Who knows?"
Alejandro De Aza started over Conforto in left field on Sunday for the second time in the four-game series in Milwaukee.
Collins plans for Conforto to return to a starting role on Tuesday, when the Mets open a homestand against the Pittsburgh Pirates.
"He's got a little bit of a wrist issue that's been bothering him," said Collins, who subsequently required a hospital trip because he felt ill. "He said it doesn't really bother him swinging. He's scuffling enough that I thought I'd let him have today and tomorrow to catch his breath."