I have stumbled across this a while ago and it slipped my mind.
Since some people in our community noticed missing JA3 support as well - which is required for some rather new rulesets, particularly those provided by abuse.ch - I create this ticket as a reminder for myself.
See also: https://community.ipfire.org/t/suricata-service-fails-errcode-sc-warn-ja3-disabled-309/3470
Patch has been sent to the development mailing list:
@Stefan: Thanks for taking care of this. :-)
Does not work, see bug 12536.