The phrase "an unexpected consequence of" is correct and usable in written English.
It can be used when discussing an outcome or result that was not anticipated or foreseen, often in relation to a specific action or event.
Example: "The new policy had an unexpected consequence of increasing employee turnover rates."
Alternatives: "an unforeseen result of" or "an unanticipated outcome of".
"What we have now is an unexpected consequence of doing the right thing".
The number of Polish migrants that moved to Britain has been an unexpected consequence of the European Union's expansion and has ethnically diversified the population.
But only now are politicians and criminologists beginning to confront an unexpected consequence of the get-tough-on-crime philosophy that created the prison-building boom.
Re "Color Me Blue" (Sunday Review, Oct. 20): Delia Ephron has captured an unexpected consequence of encouraging more biking in New York City.
There's a camaraderie in the music that Mr. Cohen credits to his recent years of touring, an unexpected consequence of what he had thought was financial ruin.
It was not an unexpected consequence of the rebuilding, but it was an unfortunate one, said James Lee Witt, director of the Federal Emergency Management Agency under President Bill Clinton and the architect of the rebuilding effort along the Mississippi.
When Borders collapsed two years ago, analysts said there was an unexpected consequence to the loss of 400 stores: the e-book growth rate began to taper off, as readers could no longer examine new titles before ordering them from Amazon.
In the meantime, however, there has been an unexpected consequence: daily sales of macadamia nuts have hit record highs.
The deployment of troops during the stoppage had an unexpected consequence today, halving the number of soldiers available to parade during the ceremonial state opening of Parliament.
We found ourselves stranded, just as dusk was rolling into dark, on the side of the road just outside of town: a not unexpected consequence of hitch hiking through eastern and southern Africa without a known person for thousands of miles.
An interesting and unexpected consequence of the subterminal breakage hotspots, was a dramatic overrepresentation of sequences derived from the ends of DNA molecules.
