Marlene Debus plays beach volleyball for TSV Unterhaching and competes in the federation “Bayerischer Volleyball-Verband”.
Currently listed in BVV U14 Damen 2025 (rank 33, 226 points); BVV U16 Damen 2026 (rank 54, 422 points); BVV U18 Damen 2026 (rank 134, 144 points). Ranking seasons: 2025–2026.