Samsung has certified the Galaxy Z Fold 3 at agencies in India and the US. While the next-generation foldable smartphone is expected to arrive in August, certification documents have confirmed multiple specifications, including support for Samsung's famous S Pen.
https://www.notebookcheck.net/Samsung-Galaxy-Z-Fold-3-Support-for-S-Pen-UWB-and-more-confirmed-by-certification-documents.547382.0.html