The 25-year-old French left-back is joining from OGC Nice on a season-long loan for a €1m fee, with Leeds holding a €5m option to buy him permanently next summer.
Bard, who has nearly 200 appearances for Nice since 2021, brings versatility as a left-back, wing-back, or even centre-back, and will challenge Gabriel Gudmundsson for starts amid injury concerns.
Daniel Farke sought this depth throughout the window, edging out West Ham's interest, while Nice lines up Niels Nkounkou as Bard's replacement.
