Abstract: A debris removal device for rain gutter downspouts is inserted between the bottom of the downspout and the top of a ground drainpipe into which the downspout empties. The device comprises an elongate tubular housing open on both ends and having an unobstructed third opening formed transversely through the tubular wall between the ends. A partition, having apertures formed therein, extends generally transversely within the tubular housing at an inclination converging toward the third opening so as to divert debris, which enters the tubular housing through the first opening, out the third opening while enabling rainwater associated with the debris to pass through the apertures in the partition and out the second opening. Water flow guides associated with the partition divert rainwater away from the third opening to inhibit it from flowing out the third opening along with the debris. A dam is provided at the bottom of the third opening to likewise inhibit the flow of water out the third opening.