There are 10 Origami Designs in Olympiad 3:

Design	Designer	Page	Details	Photo
Show only designs with photos
Fish Fish	Hsi-hua Liu	2	Square	Folded from a square of bubble-textured origami paper by Gilad Aharoni
Weave tessellation Geometric and other shapes	Andrey Ermakov	4	Square
Weave tessellation Geometric and other shapes	Daniel Kwan	6	Hexagon
Weave tessellation 3D Geometric and other shapes	Joel Cooper	10	Square
Guinea pig Mammals - Rodentia - Rats, Mice and Rodents	Chad Killeen	12	Square Also in Christmas Origami Book 2008 Also in Origami USA Convention 2009	Wet-folded from a square of double-sided mulberry paper by Gilad Aharoni
Book Objects - Books	Brian Chan	16	Square	Folded by Luc Marnat
Enigma cube Geometric and other shapes	David Brill	19	Square 12 units Also in Paper Crystals by David Mitchell	Folded from 12 squares of origami paper by Gilad Aharoni
Lady mary People	Adams Chen	21	Square
Nazgul Media and Culture	Jason Ku	25	Square
Beetle with tooth claws Insects	Hojyo Takashi	31	Square