When Judas came to betray Jesus, our Lord called him a friend or comrade (not disciple). Matthew 26:50, "But Jesus said to him, 'Friend, why have you come?' Then they came and laid hands on Jesus and took Him." 

The Greek word for "friend" has the thought of someone associating with you, but not the thought of a follower or disciple. If Judas had been "following" God's will, Judas would never have betrayed our Lord. Similarly, in the parable of the wedding garment, the person not wearing the garment is also addressed as a friend or associate. Matthew 22:12, "“So he said to him, ‘Friend, how did you come in here without a wedding garment?’ And he was speechless."  

Therefore, when and after Judas betrayed Jesus, Jesus never again identified Judas as His disciple.