What are the supplications (du'as) or Qur'anic surahs that can help a wife mend her troubled marital relationship and return her life to normalcy?

There is no specific surah (definition) or supplication to be recited for the mentioned situation. However, the wife can supplicate for her husband with whatever Allah opens up for her, such as: "O Allah, remove anger from him. O Allah, make him forbearing. O Allah, send down tranquility upon him." It is recommended that she implores her Lord using His Most Beautiful Names and supplicates to Him with humility, seeking out times when supplications are answered, such as the last third of the night, the last hour of Friday, the Day of Arafah, and during prostration.