If you have lost your AIR³ or if it has been stolen, you can maybe find it back depending on what you have done when you received it and if you have inserted a SIM card or not.
As an Android tablet, you can set a Google account. Make sure to enable location history. By logging in your Google account, you have two easy way to find your device (if the device is connected to internet):
https://www.google.com/android/find allows you to quickly find where your device is, play a sound or secure your device (Lock device and sign out of your Google Account. You can also display a message or phone number on the lock screen). https://www.google.be/maps . Go to the burger menu while connected with your account and click on "Your timeline". You can see the latest place saved with the device.
As an Android device, there are also many other ways to find your device. You can install an app such as "Wheres My Droid" that can be used for that purpose.
If you have inserted a SIM card, you can also just simply send a text message or call your device. There are many ways to find it back.