Loan watch: Garner's Carlisle exit FA Cup
Garner started and played the full 90 minutes for Greg Abbott's Cumbrians who were knocked out by Bournemouth.
Carlisle were beaten 3-1 thanks to goals from Wes Fogden, Eunan O'Kane and Marc Pugh.
Mark Beck pulled a 72nd minute goal back for the hosts.
That Garner was allowed to feature for his loan club in the F.A Cup suggests his Hornet's future will be short-lived.
In non-league action, Aaron Tumwa played the full 90 minutes at centre-half for Wealdstone in their 2-1 win over Hendon.
Goals from Lee Chappell and Nathan Webb won the tie for the Uxbridge side.
Matt Bevans made his fourth appearance for Chesham United, who beat Banbury United 3-1 at home.
The Generals have lost just once in four games since Bevans joined on-loan.