Gardai are concerned for the welfare of Michael Anesu Nhema (33), who was last seen at approximately 9am on Tuesday at Branswood, Athy, in County Kildare.
The 33-year-old, who is originally from Zimbabwe, is described as 5' 6" in height, of slight build, with black hair and brown eyes.
Gardai have no description of clothes he may have been wearing.
His car - a black Audi A4 with registration plate 131-D - was located at Raheen Car park, Bray this morning at 1.15am by Gardaí.
"Michael's family and Gardai are very concerned for his welfare", a Gardai spokesperson said.
They are appealing for anyone with information to contact Athy Garda Station on 059 8631669, the Garda Confidential Line 1800 666 111 or any Garda station.