Yes, you can pause a round by accessing the IN-GAME MENU (in footer) at any time. To resume your game, simply return to the ACTION MENU and tap "Resume game".
To access the In-Game menu tap on "More" in the footer menu
To pause your round tap on "Pause Round"
To resume your round
1. Tap on "Play" on the top right hand corner of all primary screens
2. Tap on "Resume Round"