The third MALS data release, consisting of Galactic HI 21-cm line spectra of about 20,000 radio sources, is public now. This represents the largest Galactic HI absorption line catalog to date. The new catalog and accompanying scientific results of this study are described in Gupta et al. (2025), accepted for publication in Astronomy & Astrophysics. The MALS catalogs and images are publicly available at https://mals.iucaa.in. This is the third of several radio continuum and spectral line data releases to come from MALS.