@yeminhtet 

Hey

Yes indeed there is nothing stopping you connecting 3x EAP610s into the POE switch and manually configuring each one with the same SSID and Password. 

This should work fine for you, however without a controller you will not be able to roam clients between the APs.  Each AP will work as its own separate entity. 

In short should you walk from AP1 to AP2, it will eventually drop the connection from AP1 and reconnect to AP2, but any calls / video you have running will be cut off temporarily.   With a controller this would hand over from AP1 to AP2 without disconnecting.