Embodiments of the invention provide an array substrate, a display panel and a display device. The array substrate comprises: a plurality of data lines extending in a first direction, a counter substrate region, a plurality of data pad regions and a data repair line extending in a second direction. The counter substrate region is a projection region of a counter substrate on the array substrate after the counter substrate and the array substrate are bonded together. One end of several data lines is disposed in one data pad region, and the plurality of data pad regions are disposed on one side of the array substrate and positioned outside the counter substrate region. The data repair line is provided inside the counter substrate region, along an edge of the counter substrate region and is proximate to the plurality of data pad regions.