You can read the full announcement blog post at:

https://blogs.embarcadero.com/embarcadero-interbase-2020-update-3-released/

In terms of new features, the most notable is the overhaul of InterBase Manager for Windows UI, turning from a gray to white background, adding Hig DPI support and crisp fonts, and some additional information. Here is the old and new layout:

You can find more information on InterBase and the 2020 Update 3 at the following links: