A filter assembly for filtering wash fluid to be recirculated by a circulation pump in a dishwasher appliance is provided. The filter assembly includes a first filter member and a second filter member. The first filter member defines a first filter panel and the second filter member defines a second filter panel. The first filter panel is spaced from the second filter panel along an axial direction of the filter assembly and is configured in series flow with the second filter panel. More particularly, the first and second filter panels are configured such that wash fluid is filtered by the first filter panel and by the second filter panel prior to being recirculated by the circulation pump.