Objects vanished/removed from layers

I have been working on my project and then i saved my project and then restarted Rhinoceros.I assigned objects into one layer after reopenning the rhinoceros my object are vanished/removed? I can only see 1 out of 3 object. I am not able to select the 2 unseen objects or copy them into another new layer. I have to submit my work in 4 days. I need responds and helps ASAP!

Thank you

Rhino will not delete objects in general (although there was a nasty bug on mac that could do that)
Try/Check for:

Hidden/Locked Layers
Filtered layers
Hidden Objects on hidden layers