The bank holds $3 billion in loans that are seriously delinquent or in such trouble that it does not expect payments to be made when they are due.
The bank(主语) holds (谓语)$3 billion in loans (宾语)that are seriously delinquent (定语从句)or in such trouble that it does not expect payments to be made when they are due. (???)
The bank holds $3 billion in loans that(引导定语从句,修饰loans) are seriously delinquent or in such trouble that(trouble的同位语从句) it does not expect payments to be made when they are due.
The bank holds $3 billion in loans that(引导定语从句,修饰loans) are seriously delinquent or in such trouble that(trouble的同位语从句) it does not expect payments to be made when they are due.