Mubarak was returning with a group of his friends after visiting the Wilpattu national park when the jeep he was driving crashed into a motorbike.
One person on the motorbike was killed and another injured following the accident.
Mubarak was arrested as he was driving the jeep involved in the fatal accident.
The 31 year old left hand batsman has played 10 Tests, 38 ODIs and 16 T20 internationals for Sri Lanka.
His last Test for the Sri Lankan national team was in 2007 and his last ODI and T20 was in 2009.
Mubarak still plays for the Nondescripts Cricket Club (NCC).