VAR ruled out a second-half Leicester goal as the Foxes shared the points with Leeds in an entertaining Premier League game at Elland Road.
Ademola Lookman thought he had poked home the winner midway through the second period, but was standing in an offside position when Jamie Vardy had flicked on a Youri Tielemans corner.
Leeds forward Raphinha had put his side deservedly in front in the 26th minute when his free-kick from out wide caught out Leicester keeper Kasper Schmeichel at his far post.
But Leicester responded seconds after the resulting kick-off with Barnes curling a stunner into the top corner from a tight angle.