Ecclestone told F1 business journalist Christian Sylt: "It's not on the cards for next year."
In the same CNN report, however, a spokesman for the event insisted preparations are in fact "on track for 2014".
He added that a statement will be issued after the 2014 calendar is officially published.
But Ecclestone likened the New Jersey foray to Donington's disastrous bid for the British grand prix a few years ago.
He said New Jersey "is like Donington all over again", adding that it is "such a muddle and a mess that it is not worth doing".
Ecclestone said he was surprised promoter Leo Hindery jr could not make the project work.
"The guy is a multibillionaire and is well-known in New York," Ecclestone told Sylt.