Mark Zuckerberg failed to answer a lot of questions from members of the European Parliament Tuesday — largely due to time constraints and a bizarre meeting format that let the Facebook founder and CEO peddle talking points.

"I mean I asked you six yes-and-no questions. I got not a single answer," Belgian European Parliament member Philippe Lamberts said at the conclusion of the meeting.

Zuckerberg met with European Union leaders for his third appearance before regulators to address Facebook's Cambridge Analytica scandal. EU officials, who have historically been tougher on Silicon Valley and more concerned about privacy than their U.S. counterparts, pitched tough questions on shadow profiles, data tracking and Facebook's market power.

Members of the European Parliament asked questions in bulk for the first 60-plus minutes while Zuckerberg took notes. He began addressing all the questions at once with just 7 minutes remaining in the allotted time.

"The questions were really strong. And then [Zuckerberg] basically went on kind of a five or 10-minute rehearsed, big-theme talking point. And then said, 'Oh we're 15 minutes over, peace out,' and headed for the jet," NYU professor and vocal tech critic Scott Galloway told CNBC's "Closing Bell" after the meeting.

"I was saying this morning, it felt like prom night for me," Galloway said. "A lot of expectations, and now I'm just in a haze of disappointment and unmet expectations."

Zuckerberg acknowledged the time limitations and attempted to close the meeting about 15 minutes after it was scheduled to end — to the clear exasperation of several EU officials.

"There were a lot of specific questions that I didn't get to specifically answer," Zuckerberg acknowledged as the meeting broke up. "I think I was able to address the high-level areas."

A Facebook representative was not immediately available to comment on the meeting format after its conclusion.