Trainer Charlie Appleby has paid tribute to Masar after confirming the retirement of last year's Derby winner.
Communique has continued his love affair with Newmarket to win the Princess of Wales's Stakes, with Derby winner Masar last of the six runners.
Derby winner Masar will not run again this season but has been given the green light to stay in training as a four-year-old.
Epsom Derby winner Masar will miss the Coral-Eclipse at Sandown because of a late setback.
Godolphin's royal blue silks have been carried to victory for the first time in the Derby at Epsom with Masar causing a 16-1 upset.