The Centurions recorded a loss to the Demons despite a ball not being bowled on day two, with the side losing on first innings.
Perth bowled out Joondalup for 139 on the first day and finished 9-201 at stumps. Play never resumed on Saturday due to rain, leaving Joondalup in sixth spot at the end of the round.
The Centurions face Scarborough at Iluka Sporting Complex on Saturday.
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READ NOWIn Sunday’s statewide T20 double-header matches, poor weather also denied Joondalup, with play abandoned at Breckler Park.