The party took the decision yesterday after consulting the alliance partners of the United Democratic Front (UDF), Lalthangliana told PTI.
The UDF is the alliance of eight opposition political parties which unsuccessfully contested the just concluded Lok Sabha polls by fielding a common independent candidate against the ruling Congress.
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He said that the name of the opposition candidate would be announced on Monday which is the last day for filing of nominations for the polls.
Meanwhile, nomination committee of the ruling Congress on Wednesday held discussions to name the Congress candidate for the coming polls.
The ruling Congress has 34 legislators in the 40-member state legislature, while the MNF has five members and its alliance partner, the Mizoram People's Conference (MPC) has one.