Stapp had been charged with aggravated assault with intent to commit a felony after he was arrested at his home Sunday. No one was injured, Palm Beach County sheriff's officials said.
Judge Cory J. Ciklin reduced the charge "because the allegation is that Stapp threw a bottle of Orangina at his wife, at her head, and missed and the bottle broke," sheriff's spokesman Paul Miller said.
"Based on the circumstances, the defense attorney argued that was not a deadly weapon," Miller said.
Stapp attorney Robert Gershman said, "The facts against him are weak. The judge saw that."
The 33-year-old singer was back at his studio in his home, Gershman said.
He will be subject to random drug and alcohol testing, Miller said.
Stapp and Jaclyn Nesheiwat, Miss New York USA 2004, were married in Miami in February 2006. They have a baby daughter, Milan Hayat Stapp.
"This is a private matter between the members of the Stapp family and we would hope that their privacy is respected. Scott and Jaclyn are both well, and any further relevant information will be forthcoming at the appropriate time," said a statement from Stapp's record company, Wind-up Records.
Stapp's former band, Creed, sold more than 25 million records in the United States. He has since launched a solo career.
Stapp won a Grammy Award in 2001 for best rock song for Creed's "With Arms Wide Open."