Rapper 6ix9ine received a $ 200,000 (£ 163,000) donation to a rejected children's charity.
The No Kid Hungry campaign said it has a policy of rejecting donor funds that do not fit its values.
The rapper, who was recently arrested for crimes he practiced as part of a violent gang before successfully returning, called the decision "cruel".
The Brooklyn rapper had escaped from prison on previous charges, including child sex crimes in 2015.
In a now deleted Instagram post, 6ix9ine, whose real name is Daniel Hernandez, announced that he was donating $ 200,000 to the campaign, which seeks to solve problems of hunger and poverty in the U.S.
But Share Our Strength, the non-profit organization that runs the campaign, told the BBC it declined the controversial rapper's offer.
"We are grateful for Hernandez's generous offer to donate to No Kid Hungry, but we inform his representatives that we have refused this donation," he said.
"As a child-focused campaign, it is our policy to refuse funding from donors whose activities do not align with our mission and values."
The rapper replied on Instagram that "he had never seen anything so cruel". He has since deleted the post.
6ix9ine made headlines last week for an explosive return to the spotlight after being released from prison early as part of a national effort to contain the coronavirus outbreak in US prisons.
He broke the record for an Instagram live broadcast, with over two million people tuning in at one point. His new track, Gooba, has accumulated 120 million views on YouTube in just four days.
Last year, the 24-year-old pleaded guilty to a series of gang robberies and shootings.
At the 2019 trial, the rapper initially denied the charges against him, but made a bargain, giving evidence against other gang members in order to get a reduced sentence after potentially facing the maximum life in prison.
He testified against former members of the Nine Trey Gangsta Bloods.
Offenses to which 6ix9ine was charged include extortion, possession of a firearm, assault with a dangerous weapon and charges of conspiracy murder.
In 2015, he pleaded guilty to an incident involving "sexual performance" with a 13-year-old girl and was sentenced to serving a four-year probation sentence after legal problems that followed the case.