You don't need to install any additional application to discover that individual who deleted you from your friends.
After several updates on the Facebook platform, you can at long last discover which of your contacts removed/deleted/expelled/erased you from your friends' list, without having to install external applications.
Steps to follow (remember):-
Go to your profile and tap on "activity log". This option is in the lower right area of your cover photo. There you can see everything you posted or published on your wall since you joined the social network.
Go to the "Filter" part and select "added friends". Next, you will see a chronological list of the "friends" you were adding. If you are interested in people from the past, all you have to do is indicate a specific year.
How to know who eliminated you?
To know if any of your contacts deleted you just have to hover over the name or failing, click. A window will appear (or it will send you to your profile) and if it says "friends" it is still on the platform, but if the "add" option appears, well, you know what it means
As you most likely are aware, Facebook will never notify you when a person decides to eliminate you, however, this trick will enable you to find out what year and month it did, without putting your data at risk in other applications. In addition, you will have the capacity to discover the people you deleted/removed and from which, most likely, you did not even recollect.