Contradiction with Ecclesiastes 1:9
This verse suggests that there is nothing new under the sun, while Isaiah 48:3 implies God declaring and bringing to pass new things.
Ecclesiastes 1:9: The thing that hath been, it [is that] which shall be; and that which is done [is] that which shall be done: and [there is] no new [thing] under the sun.
Contradiction with James 1:17
This verse states that there is no variableness or change with God, contrary to Isaiah 48:3 where God introduces changes through His actions.
James 1:17: Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.
Contradiction with Hebrews 13:8
This verse declares the unchanging nature of Jesus Christ, whereas Isaiah 48:3 depicts God doing new works or events.
Hebrews 13:8: Jesus Christ the same yesterday, and to day, and for ever.