Validity of Friday prayer if one joins late
I pray that this finds you well, and in the best of health and spirits. May Allah grant you all good and success in this life and the next.
One is considered to have caught the Friday prayer–like any other prayer–if one joins the congregation before the imam’s first closing salam.
However, it is sinful to delay getting to the Friday sermon (khutba) without an overwhelming excuse, because listening to the sermon is necessary (wajib).
[Shurunbulali, Imdad al-Fattah; Ibn Abidin, Radd al-Muhtar]
And Allah alone gives success.
By Shaykh Faraz Rabbani