Abstract: A debris catcher and system is provided for removing debris from fluids such as in wellbore stimulation operations. A generally tubular housing axially supports a tubular screen inside a housing bore. Debris-laden fluid flows from an intake end of the housing axially into the bore of the screen and exits screen openings radially into an axially elongated flow annulus formed between a tubular wall of the screen body and the housing bore. Debris is retained in the upstream portion of screen body and clean fluid, in the annulus, returns downstream of the screen for exit out a discharge end of the housing. The screen is removably installable to the housing.