 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.