Sutton's fading hopes of automatic promotion to the Football League were extinguished by a 2-1 defeat at Halifax.
The visitors missed a great early chance when Tommy Wright hit the crossbar from three yards out.
Halifax made them pay when Jake Hibbs released the onrushing Mike Fondop-Talom, who rounded Jamie Butler to score.
Substitute Ross Lafayette thought he had secured a point for Sutton when he headed home a corner by another replacement, Harry Beautyman.
But the hosts surged up the other end, and...