Radial-velocity evolution of Gaia BH3. Top panel: Comparison between the radial-velocity evolution predicted from the combined Gaia astrometric-spectroscopic binary model (blue solid line) and the epoch radial velocities measured with the Gaia RVS instrument (black filled circles), and ground-based measurements for Gaia BH3. Bottom panel: Radial-velocity residuals with respect to the binary solution compared with the 1-σ uncertainty of the predicted radial-velocity evolution (blue shaded area). The vertical dot-dashed line in both panels marks the time of the periastron passage.