de Grooth was included in the Netherlands' 15-man squad for the 2011 World Cup. Losing all six of their matches, the Netherlands exited in the first round. de Grooth managed 50 runs from five appearances, with a highest score of 28 against England. Later that year the Netherlands took part in the 2011 Clydesdale Bank 40. They improved on the results of the previous year, winning five and tying one of their twelve matches. De Grooth contributed 238 runs at an average of 26.44 with a single half-century.