diff --git a/CHANGELOG.md b/CHANGELOG.md
index aabb68ba04b..5d609a3de20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,10 @@ release.
 
 ### Logs
 
+- Remove the suggestion that backends or UI may represent log records with unset severity as INFO severity.
+  Source formats that do not define a concept of severity or log level SHOULD emit INFO.
+  ([#4509](https://github.com/open-telemetry/opentelemetry-specification/pull/4509))
+
 ### Baggage
 
 ### Resource
diff --git a/specification/logs/data-model.md b/specification/logs/data-model.md
index f0db90e8c41..f96f6271531 100644
--- a/specification/logs/data-model.md
+++ b/specification/logs/data-model.md
@@ -328,11 +328,8 @@ For example if the source format has an "Informational" log level and no other
 log levels with similar meaning then it is recommended to use
 `SeverityNumber=9` for "Informational".
 
-Source formats that do not define a concept of severity or log level MAY omit
-`SeverityNumber` and `SeverityText` fields. Backend and UI may represent log
-records with missing severity information distinctly or may interpret log
-records with missing `SeverityNumber` and `SeverityText` fields as if the
-`SeverityNumber` was set equal to INFO (numeric value of 9).
+Source formats that do not define a concept of severity or log level SHOULD
+set `SeverityNumber=9`.
 
 #### Reverse Mapping
 
diff --git a/specification/logs/supplementary-guidelines.md b/specification/logs/supplementary-guidelines.md
index 67346488ad6..80b098b5976 100644
--- a/specification/logs/supplementary-guidelines.md
+++ b/specification/logs/supplementary-guidelines.md
@@ -198,7 +198,7 @@ type SeverityProcessor struct {
 // if the record's severity is greater than or equal to p.Min.
 // Otherwise, the record is dropped (the wrapped processor is not invoked).
 func (p *SeverityProcessor) OnEmit(ctx context.Context, record *sdklog.Record) error {
-	if record.Severity() != log.SeverityUndefined && record.Severity() < p.Min {
+	if record.Severity() < p.Min {
 		return nil
 	}
 	return p.Processor.OnEmit(ctx, record)
@@ -206,8 +206,7 @@ func (p *SeverityProcessor) OnEmit(ctx context.Context, record *sdklog.Record) e
 
 // Enabled returns false if the severity is lower than p.Min.
 func (p *SeverityProcessor) Enabled(ctx context.Context, param sdklog.EnabledParameters) bool {
-	sev := param.Severity
-	if sev != log.SeverityUndefined && sev < p.Min {
+	if param.Severity < p.Min {
 		return false
 	}
 	if fp, ok := p.Processor.(sdklog.FilterProcessor); ok {