Not yet.

"The #Fairphone 3 ships with Fairphone OS, a #Google release, based on #Android 9 Pie, w the full set of Google #Gapps. We aim to support Fairphone3 w #security and software upgrades for 5 years. For Fairphone2, we offered #FairphoneOpen, an OS that does not have Google services pre-installed. We are currently investigating bringing back #FPOpen on Fairphone 3."

https://support.fairphone.com/hc/en-us/articles/360032971751-Operating-systems-OS-for-the-Fairphone-3