https://arstechnica.com/gadgets/2022/02/androids-february-security-patch-marks-the-last-update-for-the-pixel-3/

The February Android security patch is live, marking both the first on-time patch for the Pixel 6 and the last patch ever for the Pixel 3.

The Pixel 3 launched in October 2018 to lukewarm reviews, thanks to a giant camera notch on the XL model and a worrying dearth of RAM across the lineup. Google only offers three years of major OS updates (even on the Pixel 6), so the phone's last regular update was the Android 12 launch in October 2021. Pushing one of the biggest Android launches ever as the final update is a little scary (there are bound to be some bugs), so Google promised one last wrap-up update before it said goodbye to the Pixel 3. The device ended up with two more updates: one in January to patch that wild 911 bug and this final update. Google hasn't posted any release notes for the last Pixel 3 update, but the February update should cover all the security issues up to today, and from now on, you're out of date.