Does Bitcoin account for deleted bitcoins over time? I'm sure that this question has been asked before, but I just can't seem to find it.

If there is a limit of 21 million coins to be mined, then what happens if Bitcoin wallets get deleted? Will there still be some percentage of mining that occurs to make up for the lost coins?
If Bitcoin wallets get deleted, lost, or otherwise inaccessible, then the Bitcoins contained in them cannot be accessed anymore. There is no compensation for these "lost" Coins, and it is hard to see how there could be any such compensation. After all, nobody can prove that they lost some data. Hence any compensation scheme would likely be open to fraud.

As a consequence, Bitcoin has been called deflationary because presumably some such loss of Bitcoins will always happen. However, this does not mean that there will not be any mining after all Bitcoins have been created. Mining is driven by two kinds of rewards for the miners, the new Bitcoins (which will cease at some point) and the transaction fees that get transferred from the senders to the miners. Whilst usually it currently works just fine to send not-too-small transactions with zero fees, including one might just speed up transactions, so Bitcoin users actually have some (albeit possibly small) incentive to offer the miners a reward for their activity.