The proposal to levy fines did not mention Islam directly and is also aimed at stopping violent protesters from wearing masks, yet several politicians and campaigners refer to the measure as the "burqa ban".
Religious clashes have broken out between the majority Hindu and minority Muslim communities during religious processions in several parts of the country in recent weeks.
Muslims see the measures as an attack on their right to practice religion.
The decision, which awaits a final nod from the parliament, raises concern about the rights of the Muslim minority in the country.
Sri Lanka's foreign ministry said a decision had not yet been made on banning the burqa in the country adding that "sufficient time will be taken for necessary consultations to be held and for consensus to be reached."
The decision is the latest move affecting the Indian Ocean island nation's minority Muslims that make up about 9 per cent of the country's 22 million population.
About 51.21 percent of voters supported the controversial proposal to ban 'full facial coverings' in public, while 50.8 percent were against it, the official results showed.
Although the proposal "Yes to a ban on full facial coverings" does not mention the burqa or the niqab — there is no doubt what the debate concerns amid a campaign by some of the country's politicians to assign labels for Islam and its followers.
Opinion polls suggest a majority of Swiss will back the face veil ban, while campaigners argue that it’s about Islamophobia and controlling women in the public sphere.
Sir Lankan Muslim women question the new face veil ban imposed by the government after the Easter Sunday terror attacks, while some of them call it a misstep that encourages anti-Muslim sentiment.
Norway's fertility rates have reached all-time lows, risking the country's economic stability. Muslim immigrants are keeping the labour force alive, as the country undergoes demographic changes.
Bulgaria joins Switzerland, France and a host of other countries which prohibit some form of the burqa or niqab. Ruling party GERB says the ban aims at improving surveillance and national security.
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