Muhaarar is a bay horse with a white coronet on his right hind foot bred in the United Kingdom by his owner, Hamdan Al Maktoum's Shadwell Stud.

Starting the 5/6 favourite, he took the lead approaching the final furlong and accelerated away from his opponents to win by four lengths from Red Connect.

[9] After the race Hills said "We always knew he was a good horse but there was always going to be a question mark about the trip....Frankie thinks the French Guineas would suit him well and it will be Sheikh Hamdan's decision.

After pulling hard in the early stages he made some progress in the straight without ever looking likely to win and finished eighth of the eighteen runners behind Make Believe.

Muhaarar was brought back to sprint distances for the inaugural running of the Commonwealth Cup, a race for three-year-olds over six furlongs at Royal Ascot on 19 June.

Muhaarar accelerated clear of the field to win by 3+3⁄4 lengths from Limato with Anthem Alexander taking third ahead of the outsiders Salt Island and Profitable.

Starting 2/1 joint favourite with Brazen Beau and ridden by Hanagan he was settled behind the leaders before beginning to make progress in the last quarter mile.

He produced a strong late run to catch the leader Tropics in the final stride and won by a nose, with the 50/1 outsider Eastern Impact taking third ahead of Sole Power and Danzeno.

Ridden again by Hanagan he started favourite ahead of the filly Esoterique who had won the Prix Rothschild and finished second to Solow in the Queen Anne Stakes.

[15] On 17 October, Muhaarar started 5/2 favourite in a twenty-runner field for the British Champions Sprint Stakes over six furlongs at Ascot in which he was attempting to win a fourth consecutive Group One race.

His main rival in the betting market was Twilight Son an undefeated colt who had won the Haydock Sprint Cup on his most recent start.

Hamdan Al Maktoum ruled out a challenge for the Breeders' Cup, saying that the tight turns at Keeneland would not suit the colt's racing style.

[18] The Racing Post rated the performance the best by a European sprinter since 2011, and ranked him as the third-best three-year-old colt of the season behind Golden Horn and American Pharoah.

[20] At the end of his three-year-old season, Muhaarar was retired from racing to become a breeding stallion at his owner's Nunnery Stud at Thetford in Norfolk.