Khabib’s father suffered heart attack after being diagnosed with the deadly coronavirus.
The islanders made four changes to the team for the final that lost to India.
The 33-year-old’s current contract will expire next year.
"I'm looking forward to the new challenge and can't wait to train with the team," says 24-year-old German international.
The ECB said in a statement that Curran, 22, experienced sickness and diarrhoea on Wednesday night.
Sri Lanka legend Kumar Sangakkara was questioned for nearly 10 hours on Thursday.