Contradiction with Proverbs 1:28
This verse suggests that there are times when God will not hear or respond to those who call upon Him, which contrasts with Lamentations 3:56 where the writer expresses confidence in being heard.
Proverbs 1:28: Then shall they call upon me, but I will not answer; they shall seek me early, but they shall not find me:
Contradiction with Isaiah 1:15
In this verse, God states that even though people may make many prayers, He will not hear them, implying circumstances under which prayers are not heard, in contrast to the assurance of Lamentations 3:56.
Isaiah 1:15: And when ye spread forth your hands, I will hide mine eyes from you: yea, when ye make many prayers, I will not hear: your hands are full of blood. [make...: Heb. multiply prayer] [blood: Heb. bloods]
Contradiction with Micah 3:4
Here, it is indicated that God will hide His face and will not hear, which contradicts the notion of always being heard as presented in Lamentations 3:56.
Micah 3:4: Then shall they cry unto the LORD, but he will not hear them: he will even hide his face from them at that time, as they have behaved themselves ill in their doings.