In June, the Netherlands participated in the World T20 in England. Though the Netherlands did not progress beyond the first round, they beat England in the opening match of the tournament, an achievement hailed by captain Jeroen Smits as "Without doubt, the biggest day in Dutch cricket history". Seelaar took three wickets in the Netherlands' two matches whilst conceding 69 runs.
In June, the Netherlands participated in the World T20 in England. Despite not progressing beyond the first round, they defeated England in their opening match of the tournament, a significant achievement that captain Jeroen Smits hailed as "Without doubt, the biggest day in Dutch cricket history". Seelaar took three wickets for the Netherlands in their two matches while conceding 69 runs.