Heavy rainfall in recent weeks has forced organizers to cancel the final Caffeine & Carburetors car show of 2023. Scheduled for Sunday at Waveny Park, the antique and specialty auto show will not be held and the series will return next year, C&C founder Doug Zumbach said. “I thought about it over this past weekend, and there was really no reason to delay the decision,” Zumbach told NewCanaanite.com on Wednesday from inside his eponymous coffee shop at Pine and Grove Streets, where Caffeine & Carburetors began. Zumbach said he’s been visiting Waveny every other day to track conditions, and he grew especially concerned about the forecourt at the main house. “We’re just one of many events that have been canceled due to this rain that we have every weekend,” he said.