Contradiction with Ezekiel 29:11
This verse prophesies that Egypt will be uninhabited for forty years, while Isaiah 16:14 speaks of a three-year timeframe for the destruction of Moab, showing a contradiction in the duration of desolation prophesied for neighboring regions.
Ezekiel 29:11: No foot of man shall pass through it, nor foot of beast shall pass through it, neither shall it be inhabited forty years.
Contradiction with Amos 1:13-15
Amos prophesies the destruction of the Ammonites without a specific timeframe, differing from Isaiah 16:14's precise three-year prophecy for Moab.
Amos 1:13-15: Thus saith the LORD; For three transgressions of the children of Ammon, and for four, I will not turn away [the punishment] thereof; because they have ripped up the women with child of Gilead, that they might enlarge their border: [ripped...: or, divided the mountains]
Contradiction with Isaiah 15:1
Here, the destruction of Moab is described more generally, whereas Isaiah 16:14 specifies a three-year period until complete destruction.
Isaiah 15:1: The burden of Moab. Because in the night Ar of Moab is laid waste, [and] brought to silence; because in the night Kir of Moab is laid waste, [and] brought to silence; [brought...: or, cut off]
Contradiction with Jeremiah 48:47
Although it mentions a future restoration for Moab, it contradicts Isaiah 16:14 which implies a total and unaffected destruction within three years without mention of restoration.
Jeremiah 48:47: Yet will I bring again the captivity of Moab in the latter days, saith the LORD. Thus far [is] the judgment of Moab.