SDP leader Ivica Racan announced this at a news conference in parliament on Thursday, stressing that he expected a critical discussion on the situation on the ground.
At their last meeting, SDP deputies defined the party's objectives and tasks in election year and confirmed coordinators for the election campaign in ten constituencies.
At the meeting on Saturday the SDP is expected to adopt a document regulating the party's political activities.
Racan said he expected the Main Committee to appoint retired brigadier Ante Kotromanovic head of the SDP council for war veterans and the Homeland War.
Kotromanovic is not a member of the SDP.