This is according to a source at the Absa Premiership champions.
"Banda is a Sundowns player," says the source.
"He is on loan to Zesco.
"The club is set to extend his loan deal with Zesco for another season."
Banda had a successful trial with the Tshwane giants last year before returning to his homeland.
Downs will have to decide whether to bring him back to Chloorkop when he turns 18 next year in January.
The Brazilians currently have Soumahoro Bangaly, Ricardo Nascimento, Razak Brimah, Jeremy Brockie and Gaston Sirino as their five allotted foreigners for the season, while they have just signed Guinea-Bissau's Toni Silva for next term.
Coach Pitso Mosimane is still weighing up what to do with Ivorian midfielder Yannick Zakri and Algerian fullback Fares Hachi, who are on loan at Ajax Cape Town and Chippa United respectively.