A refrigerator appliance having an ice making assembly is provided herein. The refrigerator appliance may include a cabinet, an icemaker attached to the cabinet, an ice bin, a support tray, a fluid filter, a liquid storage volume, and a fluid pump. The ice bin may define a bin outlet at a bottom end. The support tray may be positioned below the bin outlet to receive water therefrom. The support tray may define an inclined groove extending downward toward a tray outlet. The fluid filter may be positioned below the support tray. A filter inlet may be positioned downstream from the tray outlet. A filter outlet may be positioned below the filter inlet along the vertical direction. The liquid storage volume may be positioned below the filter outlet and downstream therefrom. The fluid pump may be positioned in fluid communication between the liquid storage volume and the icemaker.