matches; they won one and the other was ended in no result. Seelaar was the Netherlands' leading wicket-taker in the competition with 13 dismissals at an average of 28.46 and best figures of 3 for 31 (3/31). Seelaar 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. Seelaar was the team's leading wicket-taker in the competition with eight wickets for 306 runs. 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. Seelaar took seven wickets at an average of 50.00. Ten teams participated in the 2011–12 Caribbean Twenty20: seven from the Caribbean and three foreign teams chosen by invitation. The three foreign teams were Canada (who had played in the previous two editions of the tournament), while the Netherlands and Sussex County Cricket Club replaced the two teams that had taken part the previous year. Seelaar was included in the 14-man squad and took three wickets at an average of 20.66. It was believed that the Caribbean Twenty20, held in January 2012, would provide good preparation for the Netherlands' participation in the 2012 ICC World Twenty20 Qualifier in March. The UAE hosted the qualifying tournament, and though the Netherlands made it to the preliminary finals they lost to Ireland and did not qualify for the World Twenty20 later that year, with Seelaar contributing eight wickets from nine matches. In February 2017, during the Netherlands 2015–17 ICC Intercontinental Cup match against Hong Kong, he and Ben Cooper set a new Dutch record for the highest partnership for any wicket in a first-class match and the highest sixth-wicket partnership in the Intercontinental Cup, when they made 288 runs. In July 2018, he was named as the captain of the Netherlands' One Day International (ODI) squad, for their series against Nepal. In July 2019, he was selected to play for the Rotterdam Rhinos in the inaugural edition of the Euro T20 Slam cricket tournament. However, the following month the tournament was cancelled. In September 2019, he was named as the captain of the Dutch squad for the 2019 ICC T20 World Cup Qualifier tournament in the United Arab Emirates. On 27 October 2019, in the match against Scotland, Seelaar took his 50th wicket in T20I