اَلسَلامُ عَلَيْكُم وَرَحْمَةُ اَللهِ وَبَرَكاتُهُ. احسن الله إليك يا شيخ If a man is in jama'ah in his 3/4 rakah and he is reciting Fatihah then the imam goes to Rukuh, should he complete the Fatihah quickly or follow the imam and leave Fatihah and bow?

Ustadh AbdulAziz al-Haqqan
If he will miss the ruku with the imam then he instantly makes ruku with him.