Does God change his mind? Many will answer no because God is immutable. This does not stop God changing his mind, as changing ones mind is not a change in character. God is immutable and will never change himself but he does change his mind.
” Then Moses pleaded with the Lord his God, and said: “ Lord, why does Your wrath burn hot against Your people whom You have brought out of the land of Egypt with great power and with a mighty hand? Why should the Egyptians speak, and say, ‘He brought them out to harm them, to kill them in the mountains, and to consume them from the face of the earth’? Turn from Your fierce wrath, and relent from this harm to Your people. So the Lord relented from the harm which He said He would do to His people. (Exodus 32:10-12-14 NKJV)
The instant I speak concerning a nation and concerning a kingdom, to pluck up, to pull down, and to destroy it, if that nation against whom I have spoken turns from its evil, I will relent of the disaster that I thought to bring upon it. (Jeremiah 18:7-8 NKJV)
Who can tell if God will turn and relent, and turn away from His fierce anger, so that we may not perish?9 Who knows? God may yet relent and with compassion turn from his fierce anger so that we will not perish.”
Then God saw their works, that they turned from their evil way; and God relented from the disaster that He had said He would bring upon them, and He did not do it. (Jonah 3:9-10 NKJV)