Assembly Design > Using Assembly > Working with Assembly Components > About Suppressed Components
  
About Suppressed Components
Suppressing a component temporarily removes it from the model, both physically and visually. When you retrieve an assembly, any suppressed component is not retrieved. This process saves time and memory when working with large assemblies. Suppressed components do not appear in mass properties and cross sections, and you cannot store them (using the Save As or Backup commands).
Unlike deleted components, suppressed components can be restored by using the Resume command.