Novel mesh implant positioning systems for use in laparoscopic body wall defect repairs, such as hernia defects, are disclosed. The systems utilize one or more bar members combined with surgical sutures and needles to position a mesh implant adjacent to a body wall defect without the need for stay sutures. Also disclosed are assemblies of the positioning systems with surgical mesh repair implants, and methods of repairing body wall defects such as hernias with the assemblies.