2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/162361We study manifolds endowed with mixed metric 3--contact structures, proving that the distribution spanned by the Reeb vector fields is integrable, with totally geodesic integral manifolds, of constant sectional curvature $k=\pm1$. We also prove a result of projectability of such structures onto paraquaternionic Kählerian structures.This paper has been withdrawn by the author(s)Differential Geometry53C15; 53C25; 53C26; 53C50text