I can't be sure without a link to your deleted question but yes, closed questions are deleted by the system after a while. You can see the details here, but in short:

If the question was closed more than 9 days ago, and ...

• not closed as a duplicate
• has a score of 0 or less
• is not locked
• has no answers with a score > 0
• has no accepted answer
• has no pending reopen votes
• has not been edited in the past 9 days

... it will be automatically deleted

This is not a judgement on you, no humans were involved in this deletion. It is simply part of the automatic cleanup that is part of the Stack Exchange system.

I can't be sure without a link to your deleted question but yes, closed questions are deleted by the system after a while. You can see the details here, but in short:

If the question was closed more than 9 days ago, and ...

• not closed as a duplicate
• has a score of 0 or less
• is not locked
• has no answers with a score > 0
• has no accepted answer
• has no pending reopen votes
• has not been edited in the past 9 days

... it will be automatically deleted

This is not a judgement on you, no humans were involved in this deletion. It is simply part of the automatic cleanup that is part of the Stack Exchange system.

I can't be sure without a link to your deleted question but yes, closed questions are deleted by the system after a while. You can see the details here, but it short:

If the question was closed more than 9 days ago, and ...

• not closed as a duplicate
• has a score of 0 or less
• is not locked
• has no answers with a score > 0
• has no accepted answer
• has no pending reopen votes
• has not been edited in the past 9 days

... it will be automatically deleted

This is not a judgement on you, no humans were involved in this deletion. It is simply part of the automatic cleanup that is part of the Stack Exchange system.

I can't be sure without a link to your deleted question but yes, closed questions are deleted by the system after a while. You can see the details here, but in short:

If the question was closed more than 9 days ago, and ...

• not closed as a duplicate
• has a score of 0 or less
• is not locked
• has no answers with a score > 0
• has no accepted answer
• has no pending reopen votes
• has not been edited in the past 9 days

... it will be automatically deleted

This is not a judgement on you, no humans were involved in this deletion. It is simply part of the automatic cleanup that is part of the Stack Exchange system.