2023 Moto3 World Championship

The 2023 FIM Moto3 World Championship was part of the 75th FIM Road Racing World Championship season. Jaume Masià won the championship with one race to spare after winning the Grand Prix of Qatar.

Teams and riders
All teams used series-specified Dunlop tyres.

Team changes

 * Intact GP entered the Moto3 class with Husqvarna and will be managed by Peter Öttl. This is Intact GP's third team across all classes, having a Moto2 team since and a MotoE team since . The team replaced Max Biaggi's Max Racing Team who left the championship after four seasons. Max Racing Team was also previously managed by Öttl during its time in Moto3.
 * QJmotor Avintia Racing Team left the championship after five seasons.

Rider changes

 * Dennis Foggia left Leopard Racing for he was promoted to Moto2. He was replaced by Jaume Masià, who moved from Red Bull KTM Ajo. Masià has previously raced with Leopard Racing in.
 * Joel Kelso moved to CFMoto Racing Prüstel GP from CIP Green Power, replacing Carlos Tatay who was left without a ride in 2023.
 * Daniel Holgado and Filippo Farioli raced for Red Bull KTM Tech3, replacing Adrián Fernández, who was left without a ride in 2023, and Deniz Öncü. Holgado moved from Red Bull KTM Ajo, while Farioli made his Grand Prix racing debut, having raced in both Red Bull MotoGP Rookies Cup and FIM JuniorGP World Championship in 2022.
 * Ryusei Yamanaka and David Alonso raced for GasGas Aspar Team, replacing Sergio García and Izan Guevara who were both be promoted to Moto2.  Yamanaka moved from MT Helmets – MSi, while Alonso made his full-time debut in Moto3, having served as a replacement and wildcard rider in  and.
 * Kaito Toba moved to Sic58 Squadra Corse from CIP Green Power, replacing Lorenzo Fellon.
 * Romano Fenati and Matteo Bertelle raced for Rivacold Snipers Team, replacing Andrea Migno and Alberto Surra, who were both left without rides in 2023. Fenati returned to the Moto3 class, having raced in Moto2 in, but was sacked midway through the season. He has previously raced with the Snipers team in  and . Meanwhile, Bertelle moved from the now defunct QJmotor Avintia Racing Team.
 * Deniz Öncü and José Antonio Rueda raced for Red Bull KTM Ajo, replacing Jaume Masià and Daniel Holgado. Öncü moved from Red Bull KTM Tech3. Rueda, who is both the 2022 FIM JuniorGP World Champion and Red Bull MotoGP Rookies Cup winner, made his full-time debut in Moto3, having served as a replacement rider in and.
 * Ayumu Sasaki and Collin Veijer raced for the newly-formed Liqui Moly Husqvarna Intact GP. Sasaki moved from the now defunct Max Racing Team, while Veijer made his Grand Prix racing debut, having raced in both the Red Bull MotoGP Rookies Cup and FIM JuniorGP World Championship in 2022.
 * Syarifuddin Azman made his full-time debut in Moto3 with MT Helmets - MSi, replacing Ryusei Yamanaka. Syarifuddin previously served as a replacement and wildcard rider in and . He also raced in the FIM JuniorGP World Championship in 2022.
 * Lorenzo Fellon and David Salvador raced for CIP Green Power, replacing Kaito Toba and Joel Kelso. Fellon moved from Sic58 Squadra Corse, while Salvador made his full-time debut in Moto3, having served as a replacement rider in  and.
 * Elia Bartolini, who raced for the now defunct QJmotor Avintia Racing Team, was left without a ride in 2023.
 * John McPhee, who raced for the now defunct Max Racing Team, left Moto3 for the Supersport World Championship as he is above the age limit of 28 when the season started.

Mid-season changes

 * Lorenzo Fellon missed seven Grands Prix starting from the Argentine round after suffering a dislocated shoulder during the warm-up lap of the Portuguese race. He was replaced for all races by Andrea Migno.
 * Joel Kelso missed the Argentine and Americas rounds after suffering a fractured ankle at the cooldown lap of the Portuguese race. He was replaced for both races by David Almansa.
 * David Muñoz missed the French and Italian rounds after suffering a left heel fracture from a crash during Q2 of the Spanish round. He was not replaced for the French round, but was replaced by Vicente Pérez for the Italian round.
 * Syarifuddin Azman missed the German round after suffering a broken rib from a crash during P2 of the Italian round. He was replaced by Danial Shahril.
 * Tatsuki Suzuki missed the German and Dutch rounds after suffering a multiple fracture in his left hand and foot from a crash during the Italian race. He was replaced for both races by Adrián Fernández. Suzuki raced for Leopard Racing from the start of the season but parted ways with the team after the Japanese round. He was again replaced by Fernández for the rest of the season, starting from the Indonesian round.
 * Romano Fenati missed the Japanese, Indonesian, Australian, and Thailand rounds due to a fractured foot sustained from a crash during P2 of the Indian round. He was replaced by David Almansa for the Japanese round, and by Nicola Carraro for the Indonesian, Australian, and Thailand rounds.
 * David Salvador missed the Japanese and Indonesian rounds due to a knee injury sustained during the Indian race. He was not replaced for the Japanese round, but was replaced by Noah Dettwiler for the Indonesian round.
 * Ana Carrasco missed the final five rounds due to an ankle injury sustained during the Indonesian race. She was replaced for all races by Vicente Pérez.
 * Joshua Whatley missed the Valencian round after suffering a broken tibia and fibula from a crash during the previous Qatar race. He was not replaced.
 * David Almansa competed during P1 of the Valencian round as a wildcard rider, but was declared unfit after suffering an injury. He was replaced by Marcos Ruda for the rest of the weekend.

Regulation changes
The minimum age to have a license for Moto3 was raised to 18 years old.

Calendar
The following Grands Prix took place in 2023:

Calendar changes

 * For the first time since 2006, Lusail in Qatar did not host the opening round due to "extensive renovation and remodelling to the paddock area and circuit facilities".
 * The British Grand Prix returned to the International Paddock of the Silverstone Circuit for the first time since 2012.
 * India and Kazakhstan were both scheduled to host their first World Championship motorcycle Grands Prix in 2023 at the Buddh International Circuit and the Sokol International Racetrack, respectively.
 * The Hungarian Grand Prix was scheduled to make its debut in 2023 but was postponed until at least 2024 due to the unstarted construction of the circuit.
 * The Aragon Grand Prix was omitted from the schedule for the first time since its introduction in 2010.
 * The Finnish Grand Prix at Kymi Ring was under contract to feature in 2023, but was not included in the provisional calendar due to safety concerns of the 2022 Russian invasion of Ukraine.
 * The Kazakhstan Grand Prix at Sokol International Racetrack was cancelled due to ongoing homologation works at the circuit, paired with global operational challenges. The event was not replaced.

Riders' standings
Points were awarded to the top fifteen finishers. A rider had to finish the race to earn points.
 * Scoring system

Constructors' standings
Each constructor was awarded the same number of points as their best placed rider in each race.

Teams' standings
The teams' standings were based on results obtained by regular and substitute riders; wild-card entries were ineligible.