Published Tuesday, 22 May 2012
A statement issued by the party on Tuesday said the Strangford MLA was expelled due to "further complaints" against him.
The party met on Monday to decide his future.
The statement said: "The disciplinary committee were asked to investigate and deal with complaints against Mr McNarry. We followed due process and arrived democratically at our decision.
"Given that Mr McNarry has the right to appeal this decision, it would not be appropriate for the Ulster Unionist Party to make any further comment at this time."
Mr McNarry's party membership was suspended in March for nine months.
This came after he told UTV that the Ulster Unionist Party was "in crisis" following the then leader Tom Elliott's decision to stand down.
Mr McNarry, now an Independent politician, quit the UUP Assembly group in January over disciplinary action, which was taken over comments he made in a newspaper interview about "secret talks" with the DUP.
He was dropped from his position as deputy chair of the Stormont Education Committee as a result.
At the time, Mr McNarry said that it was "no secret" that he and Tom Elliott had "a major bust up".
He had been in the party since he was 15-years-old.
UTV's Political Editor Ken Reid said: "We don't know what the specific complaints are - but David McNarry has been quite vociferous.
"He said he wanted to return eventually back to the Ulster Unionist Party benches - but obviously people feel that he is still criticising the party and that action needed to be taken."
He continued: "I think there's some surprise at the timing - but not at the action.
"Interestingly, Mr McNarry is out of the country at the moment - he's on holiday abroad and Mike Nesbitt, the Ulster Unionist party leader, he's in London on business."
© UTV News