The committee said the decision came as Suh, an eight-term lawmaker, sparked the factional feud that adversely affected the party's overall image. Saenuri has been facing its biggest political crisis after Park's impeachment, with some 30 lawmakers leaving the party to establish their own political alliance, the Bareun Party.

Party leader In Myung-jin has been seeking to remove key Park allies to salvage the party from the crisis caused by a scandal that led to Park's impeachment in December.

Earlier this week, the party also decided to suspend the membership of Rep. Kim Hyun-ah, a lawmaker elected as a proportional representative, for three years as she sought to defect to the splinter Bareun Party.

Suh is expected to file a lawsuit against the legitimacy of the establishment of the ethics committee, indicating the party's feud will continue for the time being.

On President Park, the committee said it has decided to put on hold measures to punish her, although the situation may change in the future.

The suspension of membership, meanwhile, is expected to deal a critical blow to the lawmakers' evaluation to be nominated as candidates for the next general election slated for 2020. (Yonhap)