Let's meet aftertomorrow, on Wednesday? Firstly,the sentence which begins with (Let's)doesn't end with a question mark because It's not a question but a command. Secondly,in Formal Arabic ,your requested clause is translated as followed: لنتقابل يوم الأربعاء,بعد غد or لنتقابل بعد غد,يوم الأربعاء in informal Arabic(more spoken) ,It would be نتقابل بعد بكرة يوم الأربع (comprehensible Egyptian dialect)

Alsalamu Alikom Let us = دعنا = da'anah Meet = نتقابل او نلتقى =Nataqabal or Naltaqee After = بعد = ba'ad Tomorrow = غد = ghad or ghadan On Wednesday = في الاربعاء = Fee al Arbea'a The translation is : دعنا نلتقي في الاربعاء Da'anah naltaqee fee al Arbea'a But when you talk about something you will do in the future you have to end the sentence by saying In shaallah = ان شاء الله = By the Allah's will Da'anah naltaqee fee al Arbea'a in shaallah ..

لنلتقى بعد الغد, الاربعاء li naltaki ,ba3da el ghad,el arbi3a'a لنتقابل بعد الغد، يوم الأربعاء li natakabel ba3da el ghad ,yawm el arbi3a'a

لنلتقى بعد الغد, الاربعاء لنتقابل بعد الغد، يوم الأربعاء

لنتقابل بعد الغد، يوم الأربعاء