"It is very unfortunate. As a filmmaker, personally, I do not like censorship at all. We always want that films should be shown. Freedom of expression is very important," he told reporters here.
He, however, said as he had not watched the three documentaries, he did not know why they were not allowed to to be screened.
The three films were about the suicide of Dalit research scholar Rohit Vemula, student protests at Jawaharlal Nehru University (JNU) and the unrest in Kashmir through the eyes of young artists.
Giving the example of Anand Patwardhan, Barua said the veteran documentary filmmaker's movies were banned initially, but after legal battles, all the films were allowed by the court.
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Barua said it is also necessary to see that people do not take advantage of freedom or misuse it and it also needs to be addressed.
"Sometimes something goes wrong, people take advantage both sides -- this way or that way. We get to see a very unwanted result," he said.
When asked if that meant documentaries should not be made on controversial issues, Barua said, "All the documentaries should be made. As a filmmaker, we need full freedom of expression.
"But when I look into this aspect that I am a citizen of a democratic nation and my views might be different, some responsibility definitely comes in. At the same time, people also needs to come forward to protest, which is also a part of democracy."
International Documentary and Short Film Festival of Kerala (IDSFFK) could not screen the three films -- In the Shade of Fallen Chinar, The Unbearable Being of Lightness and March, March, March -- as the Information and Broadcasting Ministry refused to give a censor exemption certificate to the films.