Slender squirrel

{{Short description|Species of rodent}}

{{Speciesbox

| image = Now you've got me confused... forgot where it itches.jpg

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Meijaard, E. |date=2016 |title=Sundasciurus tenuis |volume=2016 |page=e.T21164A22249784 |doi=10.2305/IUCN.UK.2016-2.RLTS.T21164A22249784.en |access-date=12 November 2021}}

| genus = Sundasciurus

| species = tenuis

| authority = (Horsfield, 1824)

| subdivision_ranks = Subspecies

| subdivision_ref = {{cite book|last1=Thorington|first1=R.W. Jr.|last2=Hoffmann|first2=R.S.|year=2005|pages=754–818|editor1-last=Wilson|editor1-first=D.E.|editor2-last=Reeder|editor2-first=D.M|url=http://www.bucknell.edu/msw3|chapter=Family Sciuridae|chapter-url=https://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=12400001|title=Mammal Species of the World: a taxonomic and geographic reference|edition=3rd|publisher=The Johns Hopkins University Press|isbn=0-8018-8221-4|oclc=26158608}}

| subdivision =

• S. t. tenuis
• S. t. bancarus
• S. t. modestus
• S. t. parvus
• S. t. procerus

| synonyms =

| range_map = Range_Sundasciurus_tenuis.png

}}

The slender squirrel (Sundasciurus tenuis) is a species of rodent in the family Sciuridae. It is arboreal and found in Indonesia, Singapore, Malaysia, and Thailand. The body is brown on the upper parts and light grey on the underparts. The body measures about 13–16 cm, with a slightly shorter slender tail. It feeds on soft bark, fruits and insects.