Is it permissible for a person to forsake a fellow Muslim for more that 3 days?

The Hadith in reference is as follows:

“It is not permissible for a Muslim to forsake his (Muslim) brother/sister for more than three days.” (Sahih Bukhari)

This ruling is subject to there being no valid Islamic reasoning for forsaking one’s Muslim brother/sister. If however, a person forsakes another Muslim for more than 3 days to avert any harm that may be caused to himself/herself or his/her worldly/religious life, then this will not fall under the ambit of the above ruling. (Faydhul Qadeer 4/506 – Mirqaat 8/3147)

And Allah Ta’ala Knows Best