The Riigikogu did not support a proposal by the opposition to reject the marriage referendum bill on Monday and the draft passed its first reading after a four-hour debate.
The proposal submitted by the opposition Reform Party and Social Democratic Party (SDE) to reject the bill was voted down with 48 votes for and 51 against.
Isamaa MPs Siim Kiisler, Üllar Saaremäe and Viktoria Ladõnskaja-Kubits voted in favor of rejecting the bill and Isamaa member Mihhail Lotman abstained.
Imre Sooäär, (Center) who has been critical of the marriage referendum, voted against the rejection of the bill. Mihhail Korb (Center) abstained.