Managers of a Gold Coast resort have been providing counselling and assistance to a staff member who reported being sexually assaulted by a foreign guest staying with a G20 delegation.

On November 15, a female staff member at the InterContinental Sanctuary Cove Resort reported the assault to her managers.

At the time, the resort was hosting the Saudi Arabian delegation, while the G20 Summit was being held at the Brisbane Convention and Exhibition Centre.

The woman withdrew her complaint within hours of police launching an investigation.

However, the man in question was "swiftly removed" from the hotel and escorted directly to the Brisbane International Airport by police and a Saudi Arabian consulate representative.

The ABC has asked the Saudi Arabian embassy for information about the man's welfare but is still awaiting a response.

Police can still investigate matters, even if a complaint has been withdrawn, but authorities are no longer looking into the alleged assault.

An InterContinental Hotel Group spokeswoman said the incident was treated seriously.

"We have offered the staff member our full support, including counselling and some time off to recover from what must have been a very upsetting ordeal," the spokeswoman said.

A spokesman from the Department of Prime Minister and Cabinet, which coordinated the G20 Summit, said it was a matter for the police.

"In accordance with its usual practice, the Australian Government does not comment on the matters involving visiting international delegations," the spokesman said.

"Any allegation of criminal conduct is a matter for the Queensland Police Service and inquiries should be directed to it."