engine light is on,code reads 3rd cylinder misfire on 2004 Mitsubishi Diamante

car has 111,000 miles,never had the fuel injectors cleaned, spark plugs, wires and distributor has been replaced at around 60,000 as well as the timing belt, same time

Asked by for the 2004 Mitsubishi Diamante
Your due for spark plugs if you only put in a platnum plug back at 60k. Do you remember what type of plug you put in back then?
autolite platnum
Ok your due for plugs. More than likely once replaced again will fix.