How to Disable Notifications from Any Facebook Group:

• Login in to your Facebook Account.
• Goto the homepage of the Group from which you want to disable Notifications.
• At the upper right corner you will see a Notification button. Click on that button and select the OFF button. This will stop all the notifications from that group.

• You can also customize notifications using  Settings button. Under this button you select the activities of group for which you want to get notifications like all Posts, Friend’s Posts.
• Then click on Save Changes button.

Once you have Disabled notifications from the group you can  revert the settings anytime i.e. make it ON to receive the notifications.