diff --git a/internal/federation/dereferencing/account.go b/internal/federation/dereferencing/account.go
index a4e74de3c..562062c8d 100644
--- a/internal/federation/dereferencing/account.go
+++ b/internal/federation/dereferencing/account.go
@@ -42,6 +42,11 @@ import (
 // accountUpToDate returns whether the given account model is both updateable (i.e.
 // non-instance remote account) and whether it needs an update based on `fetched_at`.
 func accountUpToDate(account *gtsmodel.Account) bool {
+	if !account.SuspendedAt.IsZero() {
+		// Can't update suspended accounts.
+		return true
+	}
+
 	if account.IsLocal() {
 		// Can't update local accounts.
 		return true
@@ -331,6 +336,11 @@ func (d *Dereferencer) enrichAccountSafely(
 	account *gtsmodel.Account,
 	apubAcc ap.Accountable,
 ) (*gtsmodel.Account, ap.Accountable, error) {
+	// Noop if account has been suspended.
+	if !account.SuspendedAt.IsZero() {
+		return account, nil, nil
+	}
+
 	// By default use account.URI
 	// as the per-URI deref lock.
 	uriStr := account.URI
diff --git a/internal/federation/federatingprotocol.go b/internal/federation/federatingprotocol.go
index 5a913dbbe..802a8b1dc 100644
--- a/internal/federation/federatingprotocol.go
+++ b/internal/federation/federatingprotocol.go
@@ -288,6 +288,13 @@ func (f *Federator) AuthenticatePostInbox(ctx context.Context, w http.ResponseWr
 		return nil, false, err
 	}
 
+	if !requestingAccount.SuspendedAt.IsZero() {
+		// Account was marked as suspended by a
+		// local admin action. Stop request early.
+		w.WriteHeader(http.StatusForbidden)
+		return ctx, false, nil
+	}
+
 	// We have everything we need now, set the requesting
 	// and receiving accounts on the context for later use.
 	ctx = gtscontext.SetRequestingAccount(ctx, requestingAccount)
diff --git a/internal/processing/fedi/common.go b/internal/processing/fedi/common.go
index 38c31ffd2..c41f1e00c 100644
--- a/internal/processing/fedi/common.go
+++ b/internal/processing/fedi/common.go
@@ -63,6 +63,13 @@ func (p *Processor) authenticate(ctx context.Context, requestedUsername string)
 		return nil, nil, gtserror.NewErrorUnauthorized(err)
 	}
 
+	if !requestingAccount.SuspendedAt.IsZero() {
+		// Account was marked as suspended by a
+		// local admin action. Stop request early.
+		err = fmt.Errorf("account %s marked as suspended", requestingAccount.ID)
+		return nil, nil, gtserror.NewErrorForbidden(err)
+	}
+
 	// Ensure no block exists between requester + requested.
 	blocked, err := p.state.DB.IsEitherBlocked(ctx, requestedAccount.ID, requestingAccount.ID)
 	if err != nil {
@@ -72,7 +79,7 @@ func (p *Processor) authenticate(ctx context.Context, requestedUsername string)
 
 	if blocked {
 		err = fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID)
-		return nil, nil, gtserror.NewErrorUnauthorized(err)
+		return nil, nil, gtserror.NewErrorForbidden(err)
 	}
 
 	return requestedAccount, requestingAccount, nil
diff --git a/internal/processing/fedi/user.go b/internal/processing/fedi/user.go
index 67f137f25..17663a8f4 100644
--- a/internal/processing/fedi/user.go
+++ b/internal/processing/fedi/user.go
@@ -106,6 +106,13 @@ func (p *Processor) UserGet(ctx context.Context, requestedUsername string, reque
 		return nil, gtserror.NewErrorUnauthorized(err)
 	}
 
+	if !requestingAccount.SuspendedAt.IsZero() {
+		// Account was marked as suspended by a
+		// local admin action. Stop request early.
+		err = fmt.Errorf("account %s marked as suspended", requestingAccount.ID)
+		return nil, gtserror.NewErrorForbidden(err)
+	}
+
 	blocked, err := p.state.DB.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID)
 	if err != nil {
 		err := gtserror.Newf("error checking block from account %s to account %s: %w", requestedAccount.ID, requestingAccount.ID, err)
@@ -114,7 +121,7 @@ func (p *Processor) UserGet(ctx context.Context, requestedUsername string, reque
 
 	if blocked {
 		err := fmt.Errorf("account %s blocks account %s", requestedAccount.ID, requestingAccount.ID)
-		return nil, gtserror.NewErrorUnauthorized(err)
+		return nil, gtserror.NewErrorForbidden(err)
 	}
 
 	return data(person)