Apostacy will Precede the Second Coming – Guide to the Scriptures

https://www.lds.org/scriptures/gs/apostasy?lang=eng  

13 And the anger of the Lord is kindled, and his sword is bathed in heaven, and it shall fall upon the inhabitants of the earth.

14 And the arm of the Lord shall be revealed; and the day cometh that they who will not hear the voice of the Lord, neither the voice of his servants, neither give heed to the words of the prophets and apostles, shall be cut off from among the people;

15 For they have strayed from mine ordinances, and have broken mine everlasting covenant;

16 They seek not the Lord to establish his righteousness, but every man walketh in his own way, and after the image of his own god, whose image is in the likeness of the world, and whose substance is that of an idol, which waxeth old and shall perish in Babylon, even Babylon the great, which shall fall.

Apostacy – Encyclopedia of Mormonism

Latter-day Saints believe that apostasy occurs whenever an individual or community rejects the revelations and ordinances of God, changes the gospel of Jesus Christ, or rebels against the commandments of God, thereby losing the blessings of the Holy Ghost and of devine authority.

The rise of revelatory communities, apostasies, and restorations has happened cyclically throughout the history of mankind, in a series of dispensations from the time of Adam and Enoch (Moses 7) to the present.

Apostacy – Guide to the Scriptures – https://www.lds.org/scriptures/gs/apostasy?lang=eng

A turning away from the truth by individuals, the Church, or entire nations.

Elder Marlin Jensen – Church historiander

At a Q&A session at Utah State University on January 18, 2012

And they realize that maybe since Kirtland, we never have had a period of, I'll call it apostasy, like we're having right now;

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