Shirley Jackson Malone had not been ill.
The Andrews Funeral Home in El Dorado, Ark., said the funeral would be Tuesday at Douglas Chapel Baptist Church. Burial will be at New Home Cemetery in Junction City, La.
The family asked that instead of flowers, donations be made to the American Diabetes Association.
Karl Malone, who recently left the Jazz, left the U.S. Olympic team Wednesday after learning of the death. Malone left the team hotel before practice and was flying home to Arkansas. It was not known immediately how long he would be away from the U.S. men's basketball team, which is in New York training for a qualifying tournament in Puerto Rico beginning Aug. 20.
Malone signed recently with the Los Angeles Lakers.