The 2023 FIA WRC3 Championship was the tenth season of WRC3, a rallying championship organised and governed by the Fédération Internationale de l'Automobile as the third-highest tier of international rallying. It was open to privateers and teams using cars complying with Group Rally3 regulations. The championship began in January 2023 with the Rallye Monte-Carlo and concluded in November 2023 with Rally Japan, and ran in support of the 2023 World Rally Championship.

Lauri Joona and Enni Mälkönen entered as the defending drivers' and co-drivers' champions.

Roope Korhonen and Anssi Viinikka won the 2023 drivers and codrivers championships.

The 2023 season was contested over thirteen rounds crossing Europe, Africa, North and South America, and Asia.

The championship was expected to be expanded to fourteen rounds from the thirteen rounds in the previous season by WRC Promoter GmbH, with eight Europe-based rallies and six fly-away events covering the season. However, when the calendar was released in late November following a lengthy delay, the number of the events was reduced to thirteen with the anticipated Saudi Arabian rally based at Jeddah, absent from the calendar.

Several rally organizers also expressed their interests to return to the championship, including Rally Argentina, Rally Australia, the German Rally, and an event in Northern Ireland. The Argentine, Australian and Northern Irish bids failed and Germany organized the Central European Rally along with Austria and the Czech Republic. In addition to the candidate events, the WRC Promoter GmbH was also working on the calendar expansion to the Middle East and United States, but no rallies were added for the 2023 season.

The following crews are set to enter into the 2023 WRC3 Championship: