www.bbc.co.uk/news/uk-england-41912847
It comes amid widespread allegations of misconduct at Westminster.
No formal complaint has been made to the Labour Party, which declined to give a reason for the suspension.
A Labour Party spokesperson said: "We do not comment on staffing matters."
The BBC has been told his suspension relates to his "employment" after allegations were received by Mr Corbyn's office.
The nature of the claims have not been disclosed.