Yes, Sanskrit has stems which end in e. Examples are the sup pratyaya (nominal suffix) ṅe
or the tiṅ pratyayas (verbal suffixs) e, se, te, āte, ante, dhve
. These pratyayas (suffixs) when used as nouns can take all the vibhaktis (declensions). You would find them being used in sanskrit commentaries and grammar texts.
Ex: the Pāṇini sūtra 7.1.13: ṅer yaḥ
- here ṅe
is treated as a noun ending in e-stem, and declined in sixth/genitive case.
Another example is Harināmāmṛta-vyākaraṇa sūtra 162: kṛṣṇāt ṅer yaḥ
After a masculine word ending in a-stem (called Kṛṣṇa in that grammar) ṅe
(the dative singular suffix) is replaced with ya
. One finally gets kṛṣṇāya
from this.
Another example is the single letter e which means Lord Viṣṇu according to Ekākṣara-kośa, which is declined as follows:
Mas. Sing. Dual Plural
Nom. eḥ | ayau | ayaḥ
Voc. eḥ/e | ayau | ayaḥ
Acc. am | ayau | ayaḥ
Ins. ayā | ebhyām | ebhiḥ
Dat. aye | ebhyām | ebhyaḥ
Abl. eḥ | ebhyām | ebhyaḥ
Gen. eḥ | ayoḥ | ayām
Loc. ayi | ayoḥ | eṣu
Monier-williams Dictionary also gives the word ve
- a bird and se
- service (f.) and serving (n.). It is declined like above.