The wife of a man missing in Victoria's alpine region says his disappearance is completely out of character.

The air and land search resumed on Wednesday morning for Taddeo Haigh - better known as Ted - who was holidaying with wife Elizabeth in Sawmill Settlement at Merrijig for the long weekend when he decided to go for a walk about 9.30pm on Sunday.

Missing bushwalker: Taddeo Haigh.

The German-born marine engineer has been missing for three nights, having not been since he walked out the door of their holiday cottage.

"He stopped to grab his grey hooded woollen jumper and that was it, he didn't say when he was coming back, but I wasn't expecting him to be longer than maybe half an hour or so," Ms Haigh told radio station 3AW.