The other half of the Parliament wanted the Facebook's founder to publically answer the questions in front of the Committee on Civil Liberties, Justice and Home Affairs.
Mark Zuckerberg will meet with European Union politicians to discuss Cambridge Analytica and data protection. The law will give Facebook's millions of European users more control over what companies can do with what they post, search and click.
The whistle-blower who revealed how Cambridge Analytica harvested Facebook Inc. user data to target election ads said the company could have shared that information with Russian Federation.
"Our citizens deserve a full and detailed explanation", he added. "I welcome Mark Zuckerberg's decision to appear in person before the representatives of 500 million Europeans".
The committee tweeted that it remained open to Zuckerberg giving evidence via video link, or in person, adding: "Him not appearing before us is not just a snub to the DCMS committee, but more importantly a snub to the United Kingdom and the millions of Facebook users in the United Kingdom who deserve answers".
Facebook CEO Mark Zuckerberg has agreed to appear before the EU Parliament in a move that has upset British MPs.
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That suggests he will avoid an uncomfortable public appearance and instead meet only with the legislature's top brass behind closed doors.
Zuckerberg's trip across the pond to visit Europe comes ahead of the implementation of the EU's data protection regulation.
His concern and even frustration that the leadership of the EP agreed to hold a meeting behind closed doors, was expressed by a number of parliamentarians. "It must be a public hearing - why not a Facebook Live?" tweeted Guy Verhofstadt, a Belgian politician who is also a Brexit negotiator on behalf of the European Parliament. "It is a step in the right direction towards restoring confidence".
Mr Zuckerberg has ignored repeated calls to speak before the Digital, Culture, Media and Sport Committee as part of its investigation into data protection and fake news in the wake of the Cambridge Analytica data scandal.
"We have accepted the Council of President's proposal to meet with leaders of the European Parliament and appreciate the opportunity for dialogue, to listen to their views and show the steps we are taking to better protect people's privacy", a Facebook spokesperson said in a statement.