He suggested the problem to be discussed at the meeting.能理解为He suggested that the problem should to...

He suggested the problem to be discussed at the meeting.能理解为He suggested that the problem should to...
He suggested the problem to be discussed at the meeting.能理解为
He suggested that the problem should to...

He suggested the problem to be discussed at the meeting.能理解为He suggested that the problem should to...
可以的　SHOULD是一般不加的

他建议在会议上讨论的问题

不是理解为，，就是原句子，，省略should的虚拟语气!

他建议这个问题应在会议中进行讨论。

He suggested that the problem could be discussed at the meeting.

suggest接虚拟语气

可以改成：
He suggested that the problem should be discussed...

不可。这句话的意思是：他推荐/提出了在会议上要讨论的这个问题。
而He suggested that the problem（ should） be discussed at the meeting.意思是：他建议这个问题应在会议上讨论。

啊 能