A rally spectator was taken to Letterkenny General Hospital after being injured an incident on Special Stage 12, Gartan 1, of the Donegal International Rally.
The person, a member of a rally service crew, remains under observation in hospital.
Special Stage 14, the scheduled second run around the Gartan stage, was cancelled as a result of the significant time delays.
The incident happened near the end of the stage. A competing car left the road and while a spectator was injured, organisers have indicated, despite reports to the contrary, that the car did not come into direct contact with the injured party.
The competing crew were attended to and suffered no serious injuries, but were transferred to hospital for assessment.
A statement said: “The organisers of the Donegal International Rally Ireland have confirmed the cancellation of Special Stage 14 of the event as a result of time delays caused by previous incidents.
“There was an accident on special stage 12, when a competing car went off the road, resulting in the emergency services being deployed.
“A member of a rally service crew was injured and removed to Letterkenny General Hospital where his condition is being assessed.
“The investigation of the incident is ongoing, but it is believed that the competing car may not have come into direct contact with the person involved.
“Shortly afterwards in a separate incident in the same area a local person became unwell and rally medical services, including an ambulance, were deployed to assist.
“The competing cars were rerouted back to service and the organisers later decided to cancel special stage 14, the last stage of the day, as a result of the time losses incurred.”
An elderly bystander required medical attention after falling from a wall.
Special stage 13 went ahead, but the crews were given a new roadbook and redirected back to Parc Ferme.