Contradiction with James 4:17
Contradicts in the sense of knowing what is right to do and failing to do it constitutes sin, whereas Leviticus 5:3 deals with unintentional uncleanness.
James 4:17: Therefore to him that knoweth to do good, and doeth [it] not, to him it is sin.
Contradiction with Matthew 15:11
Emphasizes what comes out of the mouth defiles a person, not what is touched, conflicting with the focus on physical uncleanness in Leviticus 5:3.
Matthew 15:11: Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man.
Contradiction with Acts 10:15
"What God hath cleansed, that call not thou common," contradicts the inherent uncleanness concept in Leviticus 5:3.
Acts 10:15: And the voice [spake] unto him again the second time, What God hath cleansed, [that] call not thou common.
Contradiction with Matthew 8:3
Jesus touching and cleansing the leper challenges the notion of becoming unclean by contact, a key aspect of Leviticus 5:3.
Matthew 8:3: And Jesus put forth [his] hand, and touched him, saying, I will; be thou clean. And immediately his leprosy was cleansed.
Contradiction with Romans 14:14
Paul's assertion that nothing is unclean in itself disputes the classification of uncleanness as per Leviticus 5:3.
Romans 14:14: I know, and am persuaded by the Lord Jesus, that [there is] nothing unclean of itself: but to him that esteemeth any thing to be unclean, to him [it is] unclean. [unclean: Gr. common]