The 19-year-old singer was recently arrested for driving under the influence, an incident that capped almost a year of wild antics for Beiber that include egging his neighbour, spitting on his fans from balcony and getting caught visiting strip clubs and brothels.
Mallette, who raised Bieber as a single mother, is concerned for his well-being following his arrest, reported E! Online qouting sources.
"As any mom of an adult child, Pattie is holding him close and talking to him about everything, but she can't make his decisions for him," a source close to Mallette said.
"She talks with him almost every day, which is likely more than any mom and a 19-year-old son... And she is in the public eye dealing with all of this.