Thari Diefenbach (Dordrecht, 25 February 1990) is a Dutch baseball player. Diefenbach plays at the Association Orioles in Bergschenhoek. She was selected for the Dutch national team that will play in 2010 during the World Championships that will be held in Venezuela from 12 to 22 August. She is also part of the women's team of the Pink Panthers in the regular men's Federal competition. Diefenbach graduated in 2008 her gymnasium diploma at the Dalton lyceum in Dordrecht.