Abstract: A triple slide assembly for a three panel door system that mounts on a two track header and allows the panels to slide easily and sequentially with an interlocking function that provides a means to align the panels. The outer rails or panels each have an inward facing track to support rollers mounted to the middle rail or panel in an alternating configuration. The track and roller assembly interlocks the three panels and has stops, positioned in the ends of the inward facing tracks, keep the panels interlocked. The inward facing tracks and middle rail or panel remain aligned with the header when the outer panels are adjusted to align with adjacent door jambs to provide a smooth sliding operation. The triple slide assembly can be used for a six-door, center opening enclosure and for a five panel sliding assembly mounted on a three track header.