He was training in Jordan until he was 14 years old, switching his tennis play to being left-handed in order to emulate his idol, Rafael Nadal.

[6] During his last junior tennis year, Shelbayh didn't feel himself on court due to personal issues, and wished to change some things and get out of his comfort zone.

[8] The following week, Shelbayh won his third ITF singles title in Trnava, Slovakia, defeating Daniel Rincón in the final.

[citation needed] On December 28, 2022, Shelbayh won the second edition of the Arab Masters Tennis Tournament, held in Kuwait City, defeating Benjamin Hassan in the final.

[9] In addition to prize money of $25,000, the win gave Shelbayh a wildcard to compete in the main draw of the 2023 Qatar Open in Doha.

In the semifinals, he again defeated lucky loser Salvatore Caruso, becoming the first Jordanian player in history and the youngest Arab to reach a final at Challenger level.

[citation needed] In April, Shelbayh won his first doubles title at Challenger level at the 2023 Murcia Open, partnering Daniel Rincón.

He beat fellow qualifier Elias Ymer in straight sets in the first round, becoming the first Jordanian player to win an ATP Tour-level match.

[citation needed] In October, Shelbayh played in Charleston, where he beat Mark Lajal, Brandon Holt, Ethan Quinn and Ryan Peniston to reach his second Challenger final.

[citation needed] In November, he qualified for the 2023 Moselle Open in Metz, France, where he defeated Hugo Gaston in the first round, registering his first tour-level win on a hard court and the second of his season and career.