I installed the 10.15.3 update without incident (at least so far). I had wanted to use the Combo, which is available here
, but the download folder that appeared said it was 10.15.2. That's probably just a typo on Apple's part, but being a cautious sort, I used the delta update available via Software Update.
macOS 10.15.5, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365