A Brown spokesman said the Republican incumbent decided not to participate in the debate “out of concern for the hardship faced by people in the path of Hurricane Sandy.”
The campaign said Brown felt it was not appropriate to go forward with a political debate when a disaster strikes.
Just last week, Brown pledged to attend the debate and even offered Democrat Elizabeth Warren a ride to the debate in his truck.
The statement did not say whether Brown would participate in the debate if it was rescheduled.
Brown and Warren had earlier Monday announced they would postpone their campaigning as the state braced for Hurricane Sandy.
The race is the most expensive in state history