Are the following three instances considered a divorce, bearing in mind that in the first instance the husband did not intend divorce and said to his wife, "I divorce you," or "I will divorce you"; and in the second instance he said to her, "You are not suitable for me"; and in the third instance he said to her, "You are divorced"?

First: Your statement "I will divorce you" is a promise of divorce that does not take effect unless it is actualized. And your statement "I divorce you" is a probable صيغة (expression) by which divorce does not take effect unless there is an intention of immediate actualization; otherwise, it is a promise of divorce.

Second: Your statement "You are not suitable for me" is an كناية (allusion/metaphor) of divorce, by which divorce does not take effect unless there is an intention of divorce. If you did not intend it, or you doubted the intention, then it does not take effect.

Third: Divorce pronounced in a state of extreme anger that obscures intention and will does not take effect.

It is recommended to avoid words of divorce and to solve problems with affection and understanding.