Verbeek, 63, had been ill for some time after stepping down as Oman head coach following the AFC Asian Cup in February.
A respected coach, Verbeek's involvement in Asian football started in 2000 as Guus Hiddink's assistant when his Dutch compatriot was head coach of Korea Republic.
Verbeek was then appointed Korea Republic's U23 head coach in 2005-06, before assuming the national team head coach role in 2006-07.
Verbeek took charge of Australia's national team in 2007-10 before becoming the Morocco U23 head coach for four years from 2010.
He took on the Oman job in 2016, guiding the West Asian side to the 2017-18 Gulf Cup title as well as the AFC Asian Cup UAE 2019 Round of 16, where they lost to Islamic Republic of Iran.
Verbeek spent his entire playing career at Sparta Rotterdam but a serious knee injury forced his retirement at the age of 25.