Abstract: A debris collection device 10 for a gutter downspout 21 includes a transparent enclosure 12 having an inlet 16 and outlet 18 that are configured to snugly insert into corresponding portions of the gutter downspout 21. A cylindrically configured debris collection screen 60 is removably installed in the enclosure 12 via a lid 48 in a cover 46 over a vertically positioned aperture 34 in the enclosure 12. The debris collection screen 60 is deformable and resilient to provide a debris collection member capable of “flattening” as more debris 65 is captured by the screen 60 thereby allowing unobstructed water flow through the enclosure 12. The transparent enclosure 12, debris collection screen 60 and lid 48 cooperate to allow an individual access to the screen 60 for removing captured debris 65 from the screen 60 without removing the screen 60 from the enclosure 12.