Hi AK Singh,
PSoC 3 and PSoC 5LP device family has almost same Hardware design considerations. Please go through the following application note:
You can also see that CY8CKIT-050 (PSoC 5LP kit) and CY8CKIT-030 (PSoC 3 kit) are almost same.
For PSoC 5LP device we have a very simple kit named CY8CKIT-059 with minimum circuiry. Link given below. You can refer it and follow the same for creating a PSoC 3 board. You can get the schematic of this kit from the same page.
Hope this helps!