You'll see the amount of the investment that is still on the books listed as a "previous period investment". When you provide your investments to the examiners, you should include this, but be sure to title it as noted above. They will include the balance on Table 14.
Be sure to factor in the value of the investment to the bank when considering holding it to term. It could be that the rate of return isn't worth hanging on to it. Or it could be a wonderful rate
You can always invest in another one if you let this one go.
When you write your performance context, if you are low on investments, but this particular one was a substantial sum, be sure to specifically address it if you hold on to it. Sometimes a bank makes a significant capital outlay for an investment that lasts several exam cycles. As time goes on, an examiner might not feel that the investment represents enough qualify because it's old. You always want to address why it was significant, and why you haven't purchased more if that is an issue, so they know everything they need to when writing up the exam.